Basic Eye Anatomy

CORNEA

The

CLEAR TISSUE
that covers the

FRONT

of the eye.

PUPIL

The pupil is the

OPENING

through which
light ENTERS

the eye.

PUPIL

IN BRIGHT LIGHT:

the pupil becomes SMALLER.

IN DIM LIGHT:

the pupil becomes LARGER.

IRIS

● The circular structure

that surrounds the pupil

● Regulates the size of the

pupil.

● Contains pigments that

give eyes their color

RETINA

A LAYER of

cells that lines

the BACK of

the eye.

RETINA

The retina contains
about 130 million
cells called rods
and cones that
respond to light.

LENS

A FLEXIBLE
structure that

FOCUSES

light.

HOW LIGHT IS FOCUSED:

The lens of your eye functions something like the lens of a
camera, which focuses light on photographic film.

Because of the way in which the lens of the eye bends the
light rays,

the image it produces is upside down and reversed.

VISION PROBLEMS

NIGHT BLINDNESS:

Inability to see well in dim light

Caused by poorly functioning rods.

Can be inherited or caused by a lack of Vitamin A.