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A 41-year-old member asked:

I have unequal pupil sizes. what is the reason why?

1 doctor answer • 2 doctors weighed in
Dr. David Chandler
Dr. David Chandleranswered
Ophthalmology 31 years experience
Many causes: An eye exam is needed to know why the pupils are unequal, as there are many causes. A slight asymmetry in pupil size might be normal for some. A dilated pupil on one side can the the sign of a serious problem (3rd nerve paralysis), as can an abnormally small pupil on one side (horner's syndrome). Adie's tonic pupil causes a large poorly reacting pupil on one side. Get an exam for a diagnosis.
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Dr. Michael Ham
Dr. Michael Ham agrees1 doctor agrees

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A male asked:
Why do my pupils dialate for no reason? I don't do drugs and i don't consume any type of alcohol, but my pupils dialate at random. They are usually bigger than they should be and when the light is dimmer you can barely see the color in my eye because of t
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Pressure in the left side of my head for nearly 2 weeks. Doesn't cause any pain but it does cause dizziness and unequal pupil size. What is it?
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Painless pressure in head won't go away with painkillers? Pressure in head can cause dizziness, drowsiness and anisocoria (unequal pupil size)?
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Last updated Jan 26, 2015

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Pupil

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