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Ask Dr. Dan B. Your Own Question
Dr. Dan B.
Dr. Dan B., Board Certified Ophthalmologist
Category: Eye
Satisfied Customers: 3343
Experience:  Eye surgeon experienced in cataracts, glaucoma, retina & neuro-ophthalmology
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Pupil gets bigger then smaller in left eye been diagnosed

Customer Question

pupil gets bigger then smaller in left eye been diagnosed with vertig on left side
Submitted: 6 years ago.
Category: Eye
Expert:  Dr. Dan B. replied 6 years ago.
Hello and thanks for your question. Depending on whether there is any problems with the movements of the eyes, drooping of the eyelids or other symptoms, a mild difference in the size of the pupils is usually a benign (harmless) finding.

The cause of the difference in dilation can be a normal variant but it can also be a damaged nerve that is responsible for pupil function as well as moving the eye in certain directions or it could be a malfunctioning sympathetic nervous system nerve either in the head, neck or chest.

Unfortunately because the signs of these are subtle only an ophthalmologist or neurologist can distinguish whether this is a normal variant or one of these problems.

If the size difference is no more than 2mm at any one time and is not accompanied by headache or eye pain, a droopy eyelid, changes in vision, double vision or other neurological symptoms then it is likely benign. If this is not the case then I would recommend seeing your eye doctor.

Does this information help address your concerns? Does this make sense? Do you have any other concerns that I haven't addressed?

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My opinion is solely informative and does not constitute a formal medical opinion or recommendation. For a formal medical opinion and/or recommendation you must see an eye doctor.