Migraine Pupil Dilation

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Anisocoria is unequal pupil size. The pupil is the black part in the center of the eye. It gets larger in dim light and smaller in bright light.

Alternative Names

Enlargement of one pupil; Pupils of different size; Eyes/pupils different size


It is normal for a person's two pupils to be up to 1 mm (.05 inch) different in size.

Babies born with different sized pupils may not have any underlying disorder. If other family members also similar pupils, then the pupil size...

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