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Cause of dilation of pupil in a child's eye - Online Doctor Chats

Date : 21-Feb-2012
User rating for this question
Very Good Posted in: Vision and Eye Disorders
Answered by

General & Family Physician
Practicing since : 2008
Answered : 3620 Questions
User :   hi.. my little boy of four has one pupil which dilates larger than the other. sometimes they are both the same and sometimes its the other eye which dilates more. he is healthy and has no known health issues. what do you think? i think he has had this a while                                                       
Doctor :   Hello.
User :   hi
Doctor :   Let me read your query.
User :   thankyou
Doctor :   When did you notice it for the first time?
User :   i dont remember. his eyes have often looked different but i thought maybe it was that one was a little darker than the other
Doctor :   Ok. Is it always in one eye?
User :   no.. it is sometimes in the other eye.sometimes they are both the same
Doctor :   Ok.
Doctor :   Pupil dilates due to amount of light which fall on it.
User :   yes. i know that.. they both contract the same but sometimes one pupil is larger
Doctor :   Ok.
Doctor :   How did you make them to contract?
User :   i took him to the window
Doctor :   Ok.
Doctor :   Then,
Doctor :   Does he have any other problems with vision?
User :   no ..
Doctor :   Ok.
User :   not that i know of
User :   maybe i should take him for an eye exam?
Doctor :   It is not required.
User :   ok.. what do you think i should do?
Doctor :   You can get an examination done , if there is problem with vision also.
User :   is it normal then?
Doctor :   It probably is normal.
User :   thankyou.
Doctor :   You can ask him for any vision problem.
User :   ok.
Doctor :   See, if both the eyes move normally in all directions.
User :   they do
User :   and some days they are completely the same
Doctor :   Also ask any problem in vision during night.
User :   ok
Doctor :   Also see any visible defects if present in eyes, which you can notice.
User :   no i dont see any
Doctor :   Ok.
Doctor :   Then he should be fine.
Doctor :   Is there any thing else i can help you with?
User :   thankyou.. i looked on the interent and it said it may be a sign of serious illness ie a tumor that worried me
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