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Conjunctiva
The conjunctiva is the thin, transparent tissue that covers the outer surface of
the eye. It begins at the outer edge of the cornea, covers the visible part of
the eye, and lines the inside of the eyelids. It is nourished by tiny blood
vessels that are nearly invisible to the naked eye.
Cornea
the outer, transparent structure that covers the iris,
pupil, and anterior chamber.
Iris
the colored ring of tissue behind the cornea that
regulates the amount of light entering the eye by
adjusting the size of the pupil.
Lens
the transparent structure suspended behind the iris
that helps to focus light on the retina.
Optic Nerve
the bundle of nerve fibers that carry visual messages
from the retina to the brain.
Pupil
light enters the eye through this adjustable opening
at the center of the iris.
Retina
the light-sensitive layer of tissue that lines the back
of the eye.
Sclera
the tough outer coat that protects the entire eyeball.
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