Pupil

 

This is the aperture into the eye lens and interior. It is guarded by the iris and this is moved by the sphincter pupillae and dilator pupillae. Pupils constrict in relation to the activity of the muscles which move the iris. The iris controls the aperture which guards the light entry into the eye called the pupil.

The muscles which move the iris are

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Sphincter pupillae

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Dilator pupillae

 

Normal eye pupil and reaction to light

 

Irregular pupil

Dilated pupil

Constricted pupil

Unequal pupil

Holmes-Adie pupil

Horner's syndrome

Argyll Robertson pupil

Hutchinson pupil

Eye dissector

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