Unequal Pupil Size Average Cost

From 47 quotes ranging from $200 - 6,500

Average Cost

$2,500

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What is Unequal Pupil Size?

The pupil is the hole at the center of the eye through which light enters. Anisocoria is a condition in which one of the pupils is abnormal, due either to persistent constriction or to dilation. This is most notable as unequal sizes between the two pupils though additional clinical signs may be present depending on the cause of the anisocoria. Anisocoria itself is not life-threatening, but because it can be a symptom of head trauma or neurological disorders, you should take your dog to the veterinarian if the anisocoria does not resolve.

Anisocoria is a condition in which a dog's two pupils are unequal in size. This is a symptom of a wide range of underlying causes, including head trauma, degeneration of the eye, or exposure to chemicals. Occasionally, the anisocoria will resolve on its own. If it persists, however, you will need to visit the veterinarian to determine the source and to see whether or not treatment is necessary.

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Symptoms of Unequal Pupil Size in Dogs

Anisocoria is characterized by pupils that are unequal in size. Because anisocoria itself is a symptom of other conditions, you may notice additional symptoms based on the underlying cause. A dog with anisocoria may be otherwise asymptomatic or may exhibit clinical signs such as:

  • Cloudy cornea
  • Discharge from the eye
  • Redness in the white part of the eye
  • Rubbing of the face
  • Growths around the eye
Types

The abnormal pupil can be either constricted or dilated. Constricted pupils are referred to as miosis, while dilated pupils are called mydriasis. Anisocoria involving a miotic pupil might be more easily diagnosed in a dark room, as the pupil will constrict when exposed to bright light. A mydriatic pupil does not respond to direct light.

Causes of Unequal Pupil Size in Dogs

Anisocoria can occur for a number of reasons, including:

  • Head trauma or injury
  • Brain disorder
  • Corneal ulceration
  • Glaucoma
  • Iris hypoplasia
  • Horner's syndrome
  • Degenerative disease
  • Exposure to chemicals or toxins

Whether the abnormal pupil is miotic or mydriatic may depend on the cause of the anisocoria. Horner's syndrome, for example, is characterized by miosis in either one or both pupils, while early glaucoma initially presents with mydriasis in one eye. There is no breed or age predilection for anisocoria, but certain dogs may be more at risk for the different conditions that lead to it.

Diagnosis of Unequal Pupil Size in Dogs

The difference between the pupil sizes may be obvious, but it may also be difficult to see. The veterinarian will first conduct a physical examination with a focus on the eyes and their structure. The eyes may be examined in both a brightly lit room and a darkened one, as the pupils may respond differently to varying amounts of light. The initial goal is to determine which eye is abnormal and whether the affected pupil is miotic or mydriatic.

Based on these findings, the veterinarian will perform additional tests to determine the underlying cause of the anisocoria. These tests may include:

  • Laboratory testing, such as blood work or a urinalysis
  • Measuring intraocular pressure
  • Staining the cornea to look for ulcers
  • Conjunctival biopsy
  • Neurologic testing
  • Radiographs of the skull
  • MRI for intracranial disease
  • Electroretinogram

Treatment of Unequal Pupil Size in Dogs

Treatment for anisocoria is highly variable, as the focus is on its underlying cause instead of on the anisocoria itself. Symptomatic treatment of anisocoria is not typically recommended.

If the anisocoria was caused by exposure to toxins, chemicals, or topical drugs, it may be reversed as the substance is removed from the system. Treatment is not necessary for certain causes, such as Horner's syndrome, which may resolve by itself over time, while degenerative disorders like iris atrophy may not be treatable at all. Talk to the veterinarian about the options that are available for your dog, and discuss which one he or she would recommend.

Recovery of Unequal Pupil Size in Dogs

If your dog received treatment for the condition that led to anisocoria, let him or her recover quietly in a safe, comfortable place. Follow any instructions given to you by the veterinarian, and administer any prescribed medications according to directions. If no treatment was recommended, monitor your dog daily to check whether or not the anisocoria has resolved. Contact the veterinarian if the anisocoria persists, or if you notice any additional symptoms.

The prognosis for recovery varies depending on the underlying cause.

Unequal Pupil Size Questions and Advice from Veterinary Professionals

Rascal
Chihuahua
3 Years
Serious condition
0 found helpful
Serious condition

Has Symptoms

Front legs seemed to by pearlized / didn't work
Pupils are different sizes
Throwing up green foam
Blood red eyes

Medication Used

None

I have a male chihuahua who got out of the fence and I looked for ..for 14 hours non stop. When I found him his pupils were two different sizes, he couldn't walk, and he threw up green foam so I gave him tea spoons of peroxside to make him throw up till there was no more green tint. Just in case he had gotten into poison or was poisoned on purpose.this was about a month ago.now he is doing much better but still not back to 100% and really wish I knew if he will ever be....

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3317 Recommendations

There are a few different causes for unequal pupil size (anisocoria) in dogs including trauma, poisoning and brain and eye conditions. It is impossible to say whether the anisocoria was caused by trauma, poisoning or other causes; I would recommend visiting your Veterinarian for an examination to determine the cause and whether it is treatable (if caused by glaucoma or another condition). Regards Dr Callum Turner DVM

I just got this new puppy I took her outside to go the bathroom and when she came back in her one pupil is bigger than the other and the white of her eye is red I didn’t see her get hurt and she didn’t whine at all like she was hurt but she still acting how she was when we got all happy and hyper I’m hoping it goes back to normal tomorrow or I gotta take her to the vet Monday.

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Zoey
Jack Russell / Chihuahua
7 Years
Moderate condition
0 found helpful
Moderate condition

Has Symptoms

Large pupil

Hi, I have a seven year old female dog and she has not had a head injury nor has she gotten into medication. I noticed one eye pupil is larger than the other but there is no redness in the eye nor is it cloudy. Should I take her to the Vet or wait? If I shine a light in her eye it doesn’t respond it stays the same. She is very active and no problem with eating everything seems normal except for the large pupil.

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3317 Recommendations
You should take Zoey to your Veterinarian as soon as possible as there are a few possible causes for the anisocoria which may include trauma or poisoning (if is still possible) among other causes which may include brain tumours, glaucoma among other conditions. Regards Dr Callum Turner DVM

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Mae
Labrador Retriever
15 Weeks
Fair condition
0 found helpful
Fair condition

Has Symptoms

Abnormal Pupils

Hey there my Silver Lab pup is only about 15 weeks old and she’s had two episodes of this happening. Early this morning and then about 1 week ago. Her eyes respond when I shine a light in them and she acts perfectly normal and within about an hour they’ve gone back to normal. I’ve called and talked to our local vet who’s seen her and he says if she’s acting fine and they return to normal she should be okay. But I’m extremely worried that something else is going on and I’m going to miss it. She did have a traumatic experience about a month ago when her snout swelled and we rushed her to the Emergency vet. She had spiked a fever but they were pretty certain that she had basically just given herself a goose egg bump on her nose and it hurt so bad she worked herself up into a fever. After an over night stay she was perfectly fine and back to normal. Both eye episodes have happened after so I just want to be certain that their not missing something.

Dr. Michele King, DVM
Dr. Michele King, DVM
1607 Recommendations
Thank you for your email. Without seeing Mae and assesssing her neurologic status, I'm not sure what might be going on with her, but that isn't normal for her pupils to be different sizes. Pupils will get small in response to pain or bright light, and large in response to adrenaline or nerve disfunction. It would be a good idea to try and her her seen when the event is happening, or video it, and show it to your veterinarian - they'll be able to assess her neurologic function and determine if there is a problem.

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Ada
German Shepherd
2 Years
Mild condition
0 found helpful
Mild condition

Has Symptoms

Squenting
Not dilating
Red Eye

My dog got hit in the eye with a rock and now her eye is not dilating. It has only been a couple of minutes. I'm not sure if it because it's starting to swell and will just go away or if it's something serious.

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3317 Recommendations
Whilst it may be an initial reaction to the trauma, it may be the start of something more serious. You should have Ada’s eye checked by a Veterinarian to determine if there is any other internal damage to the eye as well as checking her in general. Without examining her I cannot give you any assurances that the eye will be alright. Regards Dr Callum Turner DVM

I have a Dachshund and my brother accidentally hit him to hard on the head, and now his pupil size has changed, one is small, one is large, See which type of light your dog is best in for me it was dark. ( his Eyes stopped twitching )

I have a Siberian Husky. Its almost 5months old. Recently, he got Parvo Virus. After 2 weeks medication, now he is free from the virus. He recovered from the disease. But, just now I noticed that his one pupil has turned smaller in size. Please let me know what needs to be done. I am planning to take him to the doctor.

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Georgia
Chihuahua
3 Years
Fair condition
0 found helpful
Fair condition

Has Symptoms

Unequal Pupil Sizes

Hello, my dog has never had this problem before and I'm just wondering what it could be? I've never seen it before till tonight, I'm of course thinking it's the disease or pupil condition listen on here. Help😩

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3317 Recommendations

Unequal pupil size (anisocoria) may be caused by a few different conditions including glaucoma, inflammation of the iris (uveitis), ulceration of the cornea, diseases of the retina, cancer of the eye, medication or poisons. The prognosis is dependent on the underlying cause. An examination by your Veterinarian checking for corneal ulceration, high pressure in the eye as well as internal structural anomalies will help determine a diagnosis. Regards Dr Callum Turner DVM

I just got my husky puppy about a week ago and I noticed one of his pupils are bigger than the other and in one eye he has two different colors, grey and blue, half and half please tell me what’s going on.

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Juicy
Maltese x
10 Years
Mild condition
0 found helpful
Mild condition

Has Symptoms

Pupil size, coordination problems

Medication Used

none

My ten year old Maltese poodle has one dilated pupil that tears constantly. The pupil is twice as large as the other eye. She has exhibited coordination loss, night blindness and her tongue hangs from her mouth at rest. She does not complain of pain and is generally happy.

Dr. Michele King, DVM
Dr. Michele King, DVM
1607 Recommendations
Thank you for your email. There are many causes for the signs that Juicy is displaying, and they may be neurologic, or related to her eyes. It would be best to have her seen by a veteirnarian, as they can assess what might be going on with her, and determine if any treatment might be necessary.

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Skyler
2 Years
Mild condition
0 found helpful
Mild condition

Has Symptoms

Abnormal Pupils

My dog woke up this morning with one eye dialated and one not! She has bright blue eyes and she is my baby. She has not had any kind of accidents or been around any chemicals I have small children so everything is put up. I wish there was a place I could put a picture of her up so you can see. The larger pupil does not change when I shine a light to check it but it goes down when she is in a well lit room. What could it be? She is acting normal.

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3317 Recommendations

Anisocoria (unequal pupil size) is a symptom of another condition and may be caused by trauma (including corneal ulceration), disease affecting the nervous system, uveitis (inflammation of the iris), glaucoma (increase ocular pressure), poisoning or cancer. Your Veterinarian would carry out some tests including fluorescein staining of the eye to check for ulcers, examination of the eye using an ophthalmoscope, checking intraocular pressure using a tonopen as well as general reflex tests and a physical examination; from this your Veterinarian would be able to diagnose the cause of the Anisocoria and prescribe treatment or medical management. Regards Dr Callum Turner DVM

I gave my dog a bath last night and when he got out the tub he wanted to go outside. I was hesitant about letting him go because he was still partialy wet and i didnt want him to get sick. As i woke up this morning i noticed both of his eyes are smaller than usual. I really wanna help him get them back right; but i dont know what could have triggered it. Was it him going outside? Or did shampoo get in his eye? Can they catch colds? If so what are the symptoms?

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Jorja
Smooth Fox Terrier
10 Years
Moderate condition
0 found helpful
Moderate condition

Has Symptoms

limp

My dog has been limping for a couple of months. Vet has checked plus done an xray but cannot find the reason. Prescribed drugs are not helping. By chance noticed the pupil on the same side as the limp is a different size. What can this mean.

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3317 Recommendations
I do not believe that the unequal pupil size and the limp are directly related; a limp is usually caused by trauma to the leg and the unequal pupil size by head trauma, tumours, ocular disorders (glaucoma, uveitis) etc… Your Veterinarian would have noticed the unequal pupil size when you visited for the x-rays initially during the physical examination. I would recommend you get Jorja’s eyes looked at to be on the safe side as it may be something which may be treatable or manageable. Regards Dr Callum Turner DVM

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Abraham
Basenji
12 Years
Mild condition
0 found helpful
Mild condition

My dog has a cancerous tumor on his thyroid, inoperable. He now has one pupil smaller than the other and redness in that eye. This is the same side as the tumors

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3317 Recommendations
The pupillary response comes from the second and third cranial nerve with the nerves actually crossing to the opposite side at the optic chiasm. I would strongly suggest that you visit your Veterinarian as there are various different causes for unequal pupil size and the cause may be unrelated to the thyroid tumour. Regards Dr Callum Turner DVM

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Pearl
Catahoula/Australian Shepherd
8 Months
Moderate condition
0 found helpful
Moderate condition

Has Symptoms

small pupil, no reaction to light

My dog was running down the steps and tripped and slammed her head and shoulder into the concrete walkway (yesterday evening). She kind of held her head sideways for just a minute, then just seemed a little tired. Her pupils were normal. She seemed fine when she got up this morning, other than maybe not quite as active. Then a few hours later, all the sudden one pupil became really small and wouldn't react to light. 30 minutes to an hour later, it was completely back to normal. Should I be concerned?

Dr. Michele King, DVM
Dr. Michele King, DVM
1607 Recommendations
That is a little concerning, yes. It seems that the pupil change might be related to that head trauma, and if she is quieter than usual in addition to the pupil change, she might benefit from treatment. It would probably be a good idea to have an examination with a veterinarian who can assess her neurologic status and make sure that everything is okay.

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Bella
Border Collie
22 Weeks
Mild condition
0 found helpful
Mild condition

Has Symptoms

Red and swollen
Dialated pupil in my puppy

Hi I'm really worried about my 22week old puppy, after her walk yesterday we noticed her left pupil was alot larger than the right one and she has blue eyes but the colour almost disappeared aswell,and it looked red and swollen, we thought she'd maybe got something in her eye as it did return back to normal after a short time, then the same thing happened twice again after her walks today, I took her to see a vet this afternoon at the time Bella was and looked perfectly fine, and she looked in her eyes with a torch said everything looked ok and that she didn't have any ideas and come back if I got a photo of the eye then charged £40, but after googling the symptoms it seems it could be a number of things, im not very confident in going back to this vet, and im worried sick.

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3317 Recommendations

As you wrote, there are many different causes for unequal pupil size in dogs and diagnosing the problem can be tricky if it is intermittent. Try to observe Bella to try to see if there is something specific happening prior to an event as she may smell, lick or do something else that may indicate a cause. A photo of the unequal pupils will not help in a diagnosis, only to confirm the symptom you already know; checking intraocular pressure and examination of the iris and other structures are a good start to determine an underlying cause. Regards Dr Callum Turner DVM

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Squish
Miniature Australian Shepherd
4 Months
Fair condition
0 found helpful
Fair condition

Has Symptoms

Deaf
one pupil dialated
Starred pupils

My puppy is an Australian Shepard and he is deaf. He has blue eyes and one pupil that is stared and large, and one that is small and lower than the other. I noticed today that the large starred pupil got larger today. I am wondering if this is an issue I should have checked out by a vet or if it should be okay.

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3317 Recommendations
Blue eyed Australian Shepherd are prone to issues with their eyes, but should be seen by your Veterinarian to determine the specific cause of the unequal pupil size as there are a few possible causes apart from hereditary causes. Regards Dr Callum Turner DVM

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Poppet
Chihuahua
4 Years
Mild condition
0 found helpful
Mild condition

Has Symptoms

Cloudy eye
One small pupil

Medication Used

none

One of my chihuahua pupils are bigger than the other and it’s a bit cloudly she keeps blinking in that one eye as well Also to add to this her eye does seem to be a bit swallown

Dr. Michele King, DVM
Dr. Michele King, DVM
1607 Recommendations
Common causes for the signs that you are describing with Poppett are infections, irritations, corneal ulcers, glaucoma or trauma. Since I can't examine her or see what is going on with her eye, it would be best to have her seen by a veterinarian today. Eye conditions can worsen quickly, and a veterinarian will be able to look at her eyes, determine what might be going on, and get her any treatment that she may need. I hope that she is okay.

My daughters puppy is 6 months old one pupil will go really big and the other really small. I’ve read threw the Artical there has been no head trauma or anything as she got the puppy from me as I have momma dog it started out of the blue but is very noticalble..... I’m just wondering if it could be from eating the paint and plaster on the walls she has a tendency to chew on the corners of the walls or could it be more serious

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Yuki
Japanese Akita
2 Years
Mild condition
1 found helpful
Mild condition

Has Symptoms

Unequal Pupil Sizes

Medication Used

Was given Benadryl and a steroid shot

My dog just got stung by a bee. She swelled up so we took her to the vet and they gave her Benadryl and a steroid shot. The vet mentioned that the pupil that was on the side she got stung was a bit smaller than the other. The next morning the side of the sting was much bigger than her other pupil. Is her pupil different because of the sting? And will it go away after a bit of time?

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3317 Recommendations

Unequal pupil size is always concerning in dogs and may be attributable to shock or another concurrent disease process; if you are noticing large differences in the size of the pupil in the same eye whilst the other stays pretty constant you should bring this to your Veterinarian’s attention. There are many causes for unequal pupil size with trauma being a common cause, ruling out other possible causes would be a good way to go. Regards Dr Callum Turner DVM

All night last night our 3 mo old lab was suffering from an allergic reaction to something. His whole face swelled, staying with his snout which looked like it could have had a bite from something. It slowly spread overt his whole body with hives developing under the hair. This morning we have him Claritin after checking that it was safe. He seems fine, goofy as usual but a little tired. Not surprised as he hardly slept all night he was so miserable. I noticed earlier this morning that his eyes still seemed red rimmed but didn't think that was unusual. Now we just noticed that the eye on the side he had the bite (if that's what it was) is dilated while the other one is very constricted. It's good to hear that the eyes can be affected by the bite and it should go away but it also worries me because I know unequal pupils can be a sign of brain damage. I guess all we can do is watch him. Would like to know what other symptoms might be from a black widow bite as my boyfriend was getting firewood last night and we have seen black widows in the wood pile? ???

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Toby
Miniature Pinscher
12 Years
Serious condition
0 found helpful
Serious condition

Has Symptoms

unequal pupil sizes

my dog is pacing and will lay down under his blankets like normal but then soon get up and pace once more. one of his eyes are diolated to the point you cant see the brown in it he limps a little and seams unsure of ware he is going he also arched his back. we have a two year old in the house and i am worried she may have hit Toby. he is a 12 year old miniature pinscher.

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3317 Recommendations

Head trauma is a common cause of anisocoria (unequal pupil size) and may cause confusion, pacing and other problems. Other possible causes are glaucoma (an increase in intraocular pressure which can be painful and cause restlessness), uveitis (inflammation of iris) or neurological issues. Regardless, it would be best for your Veterinarian to examine Toby to determine the cause and to start treatment; in cases of glaucoma, blindness may occur if treatment isn’t prompt and the second eye may be affected within a year. Regards Dr Callum Turner DVM

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Vechirnia
Siberian Husky
4.5 months
Fair condition
1 found helpful
Fair condition

Has Symptoms

Recent Parvovirus

Is anisocoria common in puppies after they recently healed from Parvovirus? I just brought my dog home from the animal hospital today, and her right eye would not dilate after I left the lights off, went to bed, then woke up in the middle of the night. She has been in an enclosure all day to prevent recontamination of our home should she still be shedding the virus, and she's been acting regularly otherwise. I also noticed the eye seemed to normalize within 30 minutes of light exposure. I plan to take her back to the vet to do exams tomorrow, but I live in China. It's a little difficult to communicate with the vet in English, and I was just wondering if neurological issues are common in dogs who had Parvovirus. The vet did not mention it, so I think maybe they were unaware of the issue. Since there can be any number of underlying causes, it would be smart to at least know where to begin testing. I know Parvovirus can contribute to heart issues later in life, but I never heard about it causing neurological damage as well. My dog has not done anything to traumatize the eye, and it is unlikely she would have any symptoms of degenerative diseases at 4.5 months old.

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3317 Recommendations

I would check to see if there is a Veterinary School near you as they would certainly have a Veterinarian or two which speaks English, just a thought. Vechirnia would shed the virus for at least ten days post recovery so it is best to make sure she doesn’t contaminate her environment. Parvo can affect the neurological system and can cause brain inflammation which may lead to other signs like unequal pupil size. I would keep on eye on it and check for improvement. Regards Dr Callum Turner DVM

Also, my puppy has not eaten anything that could harm or poison her. As I said, she's been in an enclosure. I did clean the entire home with bleach, virus disinfectant, and a UV light a couple days ago, but the areas were all dry before her arrival. I can't think of any reason she might have developed this issue between the 8 hours I took her home from the vet to the time I noticed her eyes. She's just been resting and eating to improve her strength after being ill.

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Remi
Australian Shepherd
1 Year
Mild condition
1 found helpful
Mild condition

Has Symptoms

unequal pupil sizes

Should we take her to the vet or will it heal with time? Remi was playing and took a tennis ball to the eye accidently. She can open her eye it just looks hazy and one pupil is larger than the other.

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3317 Recommendations

Sudden injuries to the eye may cause an unequal pupil size which may be temporary but this may also be a sign of more serious damage including an increase in intraocular pressure which may be caused by secondary problems to the trauma. Keep an eye on it, but if there is no improvement by Monday morning visit your Veterinarian. Regards Dr Callum Turner DVM

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Milo
Maltipoo
7 Years
Moderate condition
0 found helpful
Moderate condition

Has Symptoms

Abnormal Pupils

Medication Used

Phenobarbital

My dog collided head-on with a larger dog at the dog park four months ago. Both dogs were running. He began seizing and drooling. We took him to the vet and he was treated for a concussion, swelling and prescribed phenobarbital for seizures (he had been getting them appx 1/month before the accident). I noticed right after the accident his pupils were two different sizes. The vet confirmed this and suggested I go to a veterinary neurologist. Another vet said it wasn't a huge concern. They are still different sizes four months later, but he is now seizure free. Should I be worried?

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3317 Recommendations

Thank you for your question. In cases of trauma, the anisocoria (unequal pupil size) may or may not resolve itself. It is a good sign that the seizures have stopped and that (I assume) no other symptoms are present apart from the unequal pupil size. If no other symptoms present themselves, I wouldn’t be too concerned; but, if other neurological symptoms present or the anisocoria gets worse, I would visit your Veterinarian for a neurological check up immediately. Regards Dr Callum Turner DVM

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Oakley
Husky
2.5 years
Mild condition
0 found helpful
Mild condition

Has Symptoms

Redness
normally reactive left eye
constriction of the right eye

Medication Used

none

My dog, Oakley, has had extreme redness in is right Eye accompanied by Anisocoria. His right eye is miotic. He seemed slightly less energetic on the first day, we are now on day 4. No altered mental status. No dietary habit changes. Now seems to be back up to his normal activity level. Should I be worried? Should I go to a vet or seek help?

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3317 Recommendations
It is possible that this may be caused by uveitis or glaucoma and it is important to visit your Veterinarian soon so that any possible management options have a better chance of being effective. If there is no evidence of trauma, those two conditions would be the next on my list of possible causes. Regards Dr Callum Turner DVM

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louie
Great Dane
8 Weeks
Mild condition
0 found helpful
Mild condition

Has Symptoms

mal formed pupil

We have been offered/rescue a 8 week old Great Dane however we noticed one of his eyes appeared to be a lazy eye. The breeder had a Vet look and the vet said the dog had a malformed Pupil but that the dog can see. We were all set on accepting this dog into our family but I am a bit afraid of long term health of dog and medical care of the dog.

Dr. Michele King, DVM
Dr. Michele King, DVM
1607 Recommendations
Thank you for your email. It would be worth more information for you before you decide to keep this dog. If the pupil is a different size of shape but the eye otherwise appears healthy, it may be fine long term. If there is any evidence of senechia, or developmental problems with the pupil, that may have longer term consequences. You should be able to either talk to the veterinarian who saw Louie, or have him examined by your own veterinarian, to get more details on what might be expected long term.

thats not it

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Rocky
Siberian Husky
3 Years
Moderate condition
0 found helpful
Moderate condition

Has Symptoms

Large Pupil and Blood filled eye

Medication Used

none

About 2 months ago, I noticed on my male 3 yr old Siberian husky his left eye pupil was very dialated, two days later it started to bulge and cloud over, I rushed him to the vet, they checked the eye and prescribed ointment, it took care of the cloudiness, but did nothing for the bulging or the enlarged pupil, last weekend I noticed redness or blood in his eye, within a day that cleared, then came back with a vengeance, blood took over the whole eye, rushed him again to vet, they said they couldn't give him a proper examination due to his eye being completely filled with blood, there was no charge, but said it was definitely not trauma and he is too young to be cancer, but there are exceptions to everything, no prescriptions or ointments, said they would do very little and in most cases these symptoms clear on their own, they said to wait and watch, any change, for better or worse to bring him back, if there is discharge and seems to be healing then they can do a proper exam, if there is more bulging then they'll have to stick a needle in the eye to drain it. Question: Can he lose the eye? I have 2 huskies that stick together like glue, the other is fine

Dr. Michele King, DVM
Dr. Michele King, DVM
1607 Recommendations
Thank you for your email. I might seek a second opinion. Without examining him, I cannot comment on what is going on with his eye, but if his eye seems to be bulging, he should have his eye pressures checked to make sure that he doesn't have glaucoma, and if he has blood inside the actual chambers of his eye, he is in immediate danger of developing glaucoma. There are medications that can be used to clear up the blood, inflammation, and treat his eye pressures if that is a problem. "Watch and wait" is seldom a good idea when it comes to eye problems. If your veterinarian is closed today, or you aren't able to find another veterinarian for a second opinion, you should take him to the nearest 24 hour clinic and have his eye examined. I hope that he does well.

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Miya
Alaskan Husky
6 Months
Mild condition
1 found helpful
Mild condition

Medication Used

none

I have a 6 month old female Siberian husky. She hasn’t had any health problems or injurys. She’s perfectly normal and healthy. However, last night her pupil in her left eye suddenly shrunk to just a pin point size. The other eye was very dilated. The left pupil that shrunk would not respond to light at all. She could still see out of that eye though. After about 2 hours it went back to normal. I took her to the emergency vet but they were not much help. What could have caused this? What should I do if it happens again?

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3317 Recommendations
There are various causes for unequal pupil size in dogs which may include head trauma, eye injuries, poisoning, brain tumours (too young) among other causes; I cannot think of a specific reason why Miya had this episode, but if her eye is back to normal you should keep a close eye to see if it happens again. If this episode occurs again you should visit your Veterinarian or consult with a Neurologist if you have further concerns. Regards Dr Callum Turner DVM

I have an 18 month old husky, she has had this since i got her at 10 weeks. It comes and goes so i never really worried about it because she seemed to be acting normal. In feb she started having seizures. I dont have much history on her as she given to me as a gift. I am wondering now if the 2 conditions have anything to do with one another and could it be genetic that she was bred from a poor line?

I have a puppy that did this too! She is Siberian husky and German shepard mix and she has an episode just like these at 14 weeks old and just again tonight at 5 months old. Both times the episode has been unrelated to any injury or event and has resolved on its own in 30-60 minutes. I watched as her first episode happened. I actually watched one of her pupils become pinpoint, so I rushed her to the vet right away. Granted, I live in a small town so our vets don't see the most unusual cases, but all three vets at the practice took a look at her and had no idea what was going on. They suggested genetic testing. As of right now, my dog has no aura before the event and acts fine both during and after the episode, so I can only assume that it's something going on specifically in the occipital lobe of the brain or the optic nerve. I am a nurse, so just by habit I have been keeping a chart of everything that could be related to this condition, and I noticed that my puppy also has episodes of sleep incontinence. She is otherwise fully potty trained, but she has urinary incontinence about once every 10 days. Has anyone else noticed their puppy has this issue as well? I am wondering if the two symptoms are connected.

I have a 4 month old Husky and I noticed about an hour ago that his pupils were drastically different in size and I got really worried and as I was researching his pupils resolved themselves to normal size and are equally reactive to light, no other symptoms. It seems like there are several other posters with a husky who have had this condition occur and resolve on it's own, I wonder if there could there be a connection between the prevalence of this condition and this breed?

I have a Siberian Husky puppy who is almost 7 months old. She did the same thing last night. Her eyes went back to normal in about 20 min.
The only thing different that we know of was she was given a new treat, she had never had before about 15 min prior to her eyes. One was pin size small and the other was really dilated.
We took her to the vet today and she checked out fine. Was wondering how your puppy is doing and if it happened again.

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Cody
Chihuahua
8 Years
Mild condition
0 found helpful
Mild condition

Has Symptoms

From side to side, discharge from the eyes
Anisocoria, unbalanced gait, shaking the head

Yesterday morning my dog got hit by a car. When I picked him up from out of the street his breathing was rapid and shallow, he was stiff and tongue was hanging out his mouth. He recovered a little that morning and he was able to walk around he doesn't have any broken bones, no bleeding in his ears, he's cognitive. But last night and this morning I noticed that when he tries to get up or sit he's unbalanced, and moves slower. His left pupil is smaller than his right, and they are oozing white/clear discharge.

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3317 Recommendations

Being hit by a car is a traumatic event and is certainly the cause of the anisocoria and the other symptoms. I would recommend visiting your Veterinarian for a neurological exam and well as a general check (ensure no abdominal bleeding, fractures or subluxations). I would be concerned about bleeding in the abdomen, bleeding in the brain, fracturing of the ribs (not always easily evident) along with other usual signs of trauma. Regards Dr Callum Turner DVM

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Bindi
Siberian Husky
9 Months
Fair condition
0 found helpful
Fair condition

Has Symptoms

Limping

My dog went outside to go potty but then when she came inside she had a scratch on her snout a little under her eye. I thought maybe she got in a fight with the neighbors dog. But then as I was looking at her in the light I noticed that one of her eyes was dialated a lot more than the other one. What could it be?

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3317 Recommendations

Anisocoria (equal pupil size) may be caused by a few different conditions including trauma, neurological disease, inflammation of the iris, glaucoma, poisoning, cancer or scar tissue formation; given the scratches to Bindi’s muzzle and near her eye damage to the cornea is likely. Your Veterinarian will examine her eye with an Ophthalmoscope as well as putting fluorescein dye in her eye to look for corneal damage. Regards Dr Callum Turner DVM

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Copper
12 Weeks
Mild condition
0 found helpful
Mild condition

Has Symptoms

Abnormal Pupils

My dogs collar got around his head, he fell asleep and when he woke up the left eye was large and the small eye was very smal, but he can still walk straight.What do we do to fix this?Or do we need to go to the Veterinarian?

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3317 Recommendations

Thank you for your question. One of three outcomes may occur: the eye will get better, the eye will stay the same or the eye will get worse. The cause of the unequal pupil size would determine the treatment and overall recovery. If the unequal pupil size was down to glaucoma or a toxic agent, then the treatment or removal of the toxin would usually resolve the problem. In cases of trauma or idiopathic origin the condition may not be repairable. If there are no other symptoms and Copper is walking, playing, eating and drinking you may monitor the situation to see if it resolves it’s self. If there are any changes to the affected eye or any other symptom becomes apparent, visit your Veterinarian immediately. Regards Dr Callum Turner DVM

Can my little dogs big pulled make her walk funny and look at me like she's lost?

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Archer
German Shepherd
5 Months
Fair condition
0 found helpful
Fair condition

Has Symptoms

Abnormal Pupils

We just brought home a new puppy they were outside playing. He was extremely excited for the new pup and was all over the place when we came back in the house we noticed one of his pupils was larger then the other. He's still trying to play and is super excited but drooling a lot

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3317 Recommendations

Unequal pupil size may be caused by neurological problems or disorders of the eye; these may be categorised as trauma (including ulceration of the cornea), inflammation, congenital, cancerous or glaucoma. Any sudden change in pupil size should be examined by your Veterinarian to determine the cause and treatment of the condition. Regards Dr Callum Turner DVM

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Ichabod
Siberian Husky
2 Years
Mild condition
1 found helpful
Mild condition

Has Symptoms

Inherited disorder
Unequal pupil size

My soon to be three-year-old Siberian husky when he was 10 weeks old his left eye pupil went extremely small and went away within a couple of hours just did not affect him at all and he still acted normal and playful. Our vet said they do not know what could cause that but he was not affected by this at all. Then he had a litter of puppies and two out of three of those puppies it happened to and went away within an hour. Is this a sign of a degenerative disorder inherited by their father? Also do you have to take and have the special tests done at a vet ophthalmologists to get these answers?

Dr. Michele King, DVM
Dr. Michele King, DVM
1607 Recommendations
Thank you for your email. I"m not aware of any hereditary condition that causes intermittent changes in pupil size, but it is unusual that so many related dogs have had this happen. It would probably be best to make an appointment with a veterinary ophthalmologist, as that is not a routine problem, if it is something that requires treatment. They will be able to advise you as to whether it is anything to worry about, or if it may be a problem.

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Mia
Alaskan Husky
3 Months
Fair condition
0 found helpful
Fair condition

Has Symptoms

Abnormal Pupils

When playing with my 3 month old female husky, a toy accidentally hit her in the face. Immediately after, her right eye’s pupil became significantly smaller than the right. When exposed to a lower amount of light, the right pupil becomes normal. When exposed to a larger amount of light, the right pupil becomes small. The left pupil is normal as well as her behavior. What would be the best thing to do now?

Dr. Michele King, DVM
Dr. Michele King, DVM
1607 Recommendations
Thank you for your email. A small pupil can be a sign of pain, or neurologic problems. If the change in her pupil size is not resoliving, it would be best to have her seen by your veterinarian, to have her responses examined and have treatment started, if necessary. i hope that she recovers normally.

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Bella
Boarder collie
3 Years
Mild condition
1 found helpful
Mild condition

Has Symptoms

Red eye small pupil

My dog was playing outside with our new puppy.she got mud in her eye. I have flushed the eye clean but her pupil is very small in that eye. And watering. I will watch it for 24 hours. Do you think I need to take her in right away.

Dr. Michele King, DVM
Dr. Michele King, DVM
1607 Recommendations
Thank you for your question. If her pupil is still smaller in that eye, it might be a good idea to take her in this morning and have her examined. Small pupils can indicate pain in that eye, and she may benefit from medication for it. I hope that she feels better soon.

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Smokey
Dachshund
2 Years
Mild condition
0 found helpful
Mild condition

Has Symptoms

Pupils are different sizes

One of smokeys pupils was fully constricted and she was squinting as if that eye was bothering her. Since then she has stopped squinting and she pupil has begun to return to normal but it is still not the same. I am unsure what might have caused this but she seems to be mostly herself but it has only been a few hours.

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3317 Recommendations

Various conditions may cause anisocoria including head trauma, glaucoma, irritation, neurological disorders, poisoning. If Smokey isn’t showing any other symptoms and the pupil is returning to normal size, keep an eye on her; if the problem recurs, try to visit your Veterinarian whilst it is occurring. Regards Dr Callum Turner DVM

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