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Pupils Different Sizes

Free Symptom Checker
with Physician-supervised AI

Reviewed By:

Ami Shah Vira, MD (Ophthalmology)

Dr. Shah Vira grew up in Arizona. She moved to Chicago to complete a combined engineering and medical program at the Illinois Institute of Technology (IIT) and Chicago Medical School. She completed a highly competitive two year dual fellowship in Neuro-ophthalmology and Oculoplastic at the highly regarded Ohio State University in Columbus, Ohio. Dr. Shah Vira specializes in surgical correction of the eyelids and eyebrows, eyelid malposition and tumors, excessive tearing, and conditions involving the orbit.

Shohei Harase, MD (Neurology)

Dr. Harase spent his junior and senior high school years in Finland and the U.S. After graduating from the University of Washington (Bachelor of Science, Molecular and Cellular Biology), he worked for Apple Japan Inc. before entering the University of the Ryukyus School of Medicine. He completed his residency at Okinawa Prefectural Chubu Hospital, where he received the Best Resident Award in 2016 and 2017. In 2021, he joined the Department of Cerebrovascular Medicine at the National Cerebral and Cardiovascular Center, specializing in hyperacute stroke.

From our team of 50+ doctors

Content updated on Jan 4, 2023

Following the Medical Content Editorial Policy

Worried about your symptoms?

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One pupil is larger than the other

Anisocoria

Find another symptom

Search for another symptom

How Ubie Can Help You

With an easy 3-min questionnaire , Ubie's AI-powered system will generate a free report on possible causes.

Questions are customized to your situation and symptoms, including the following personal information:

Biological Sex - helps us provide relevant suggestions for male vs. female conditions.
Age - adjusts our guidance based on any age-related health factors.
History - considers past illnesses, surgeries, family history, and lifestyle choices.

Your symptoms

Our AI

Your report

Your personal report will tell you

✔ When to see a doctor

✔︎ What causes your symptoms

✔︎ Treatment information etc.

People with similar symptoms also use Ubie's symptom checker to find possible causes

The black of my eyes are of different sizes
Pupils look different to each other
Pupil size is different
Pupils asymmetrical

Just 3 minutes.
Developed by doctors.

Try Free Symptom Quiz

Possible Causes

Generally, Pupils different sizes can be related to:

Syphilis (Including Syphilitic Alopecia)
A sexually transmitted infection caused by the spirochetal bacteria T. pallidum. The disease has many stages, from lumps and ulcers in the groin to involvement of the heart, brain, and nerves.
Diabetic Neuropathy
Diabetic neuropathy is a kind of nerve damage that can happen in people with long-term diabetes. High blood sugar can harm nerves all over the body, mainly in the legs and feet.

Related Serious Diseases

Sometimes, Pupils different sizes may be related to these serious diseases:

Cerebral Hemorrhage
This is a life-threatening condition where bleeding occurs in the brain tissues or spaces. It is a type of stroke. Causes include high blood pressure, weakened blood vessels, bleeding from a tumor, and head trauma. Risk factors include hypertension, excessive alcohol consumption, and diabetes.
Acute Epidural Hematoma
Cerebellar Hemorrhage / Infarction
Cerebral Infarction
Subarachnoid Hemorrhage
Chronic Subdural Hematoma

Doctor's Diagnostic Questions

Your doctor may ask these questions to check for this symptom:

Are your pupils different sizes?
How long have you had unequal pupil size in your left and right eyes?

Just 3 minutes.
Developed by doctors.

Try Free Symptom Quiz

Find Similar Symptoms

Similar symptoms or complaints

Symptoms from similar body parts

Symptoms treated by the same specialty

References

Heath Jeffery RC, Young B, Swann PG, Lueck CJ. Unequal pupils: Understanding the eye's aperture. Aust J Gen Pract. 2019 Jan-Feb;48(1-2):39-42. doi: 10.31128/AJGP-07-18-4641. PMID: 31256448.
https://www1.racgp.org.au/ajgp/2019/january%E2%80%93february/unequal-pupils

Reviewed By:

Ami Shah Vira, MD (Ophthalmology)

Shohei Harase, MD (Neurology)

From our team of 50+ doctors

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