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Structure of the Eye

Iris - round muscle (the colored part of the eye) in which the pupil is located;  can change the size of the pupil, letting more or less light into the eye; helps focus the image.

Lens – another clear structure behind the iris, suspended by muscles; finishes the focusing process begun by the cornea.

Visual accommodation - the change in the thickness of the lens as the eye focuses on objects that are far away or close.

Vitreous humor - jelly-like fluid called that also nourishes the eye and gives it shape.  

LO 3.4    Parts of the eye

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