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 |  | Anisocoria: Unequal Pupil Size Normally, the pupils of the eyes are equal in size, are both round in  shape and both react quickly and equally to light and any change of  focus.    Anisocoria   is the medical term that simply means the pupils are not equal.  The  pupil also contracts when the eye changes focus from far away to close  up. 
 The pupil is not actually a structure, but is simply a little  window in the center of the colored part of the eye, the iris.  The iris  muscles control the size of the pupil, making it l...Read More
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