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A 43-year-old member asked:

i have an unequal pupil size, should i be worried?

1 doctor answer2 doctors weighed in
Dr. Richard Bensinger
Ophthalmology 52 years experience
Probably not: Unless you have had some direct injury to the eye or to the nerves to the eye, it is probably ok. There is commonly a little difference between pupils and if the difference is 1 mm or less, that is considered normal. If you vision is fine and the eye feels fine, don't worry about it.

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A 35-year-old member asked:

What are the causes of dilation of pupils?

2 doctor answers9 doctors weighed in
Dr. David Miller
Dr. David Milleranswered
Family Medicine 10 years experience
A few things: I assume you mean dilated and not responding to light. This can be caused by a number of drugs including scopolamine, atropine, most hallucinogens and many others. These should cause the pupils to be dilated equally (unless directly applied to one eye). If your pupils are not equal, then we start to get worried about problems like a head injury and you should seek immediate medical attention.
A 18-year-old member asked:

How much should pupils react to light? When I turn light on they get a little smaller then right back to normal. They usually react better. Is it ok?

2 doctor answers5 doctors weighed in
Dr. Quang Nguyen
Specializes in Endocrinology
Sounds normal: As long as you don't feel any discomfort with the light, then the pupil reaction is normal. It doesn't have to constrict completely, just enough to protect you.
A 48-year-old member asked:

When my daughter(10years old) gets tired her pupils seem to enlarge.Is this a problem?

3 doctor answers8 doctors weighed in
Dr. Kevin Considine
Family Medicine 30 years experience
Not usually: If your daughter's eyes dilate when she is tired this may be a normal pattern or variant function for her. If she is not complaining of eyesight problems i wouldn't be too concerned but if she has never had a routine eye check she should be checked anyway to rule out other issues if possible.
A 33-year-old member asked:

Can you dilate or shrink your pupils without any problems even while wearing contact lens?

1 doctor answer1 doctor weighed in
Dr. Alan Westeren
Ophthalmology 28 years experience
Yes & no - see below: Pupil constriction and dilation in response to different levels of lightis unaffected by contact lenses. However, if pupils being pharmacologically altered for eye exam or prior to eye surgery, then conact lenses should always be removed prior to instillation of of eye medications.
A 38-year-old member asked:

What problem are unequal pupils a sign of?

1 doctor answer2 doctors weighed in
Dr. Arthur Heller
Gastroenterology 43 years experience
May be normal, or no: Unequal pupils (anisocoria) can be seen in 10% of normals. May be seen with abnormalities of the cranial nerves, multiple sclerosis, other issues. New finding? See your doc for sure to rule out a serious problem.

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Last updated Mar 29, 2014
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