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The retina is a layer of lightsensitive cells in the back of the
eye.
Photoreceptors are specialized
neurons that detect light and
are found in the retina.
Rods are the photoreceptors
that detect dim light. These
help determine shades of grey
at night.
Cones are the
photoreceptors
that detect bright
light and help you
see colors. Both
rods and cones
connect to nerve
cells to send signals
to your brain.
The optic nerve is the nerve that
transfers electrical impulses from the
eye to the brain.
The iris is the colored part of
the eye. It is made of muscles to
open and close the pupil.
The pupil is the opening at the
front of the eye inside the iris. This
is where light enters the eye.
The cornea is a transparent
membrane that is found on the
front of the eye. It protects the
eye, but allows light to enter.
The lens is a curved, transparent
object that forms an image by
refracting light. It is located behind
the pupil and the iris.
Aqueous humor is clear fluid found
between the cornea and the lens. It
helps maintain the shape of the
eye.
Vitreous humor
is a clear , jellylike substance
between the
lens and the
retina. This also
helps maintain
the shape of the
eye.
Sclera is the white of the eye.
This is where the blood vessels
provide the eye with nutrients
and oxygen.
Using this picture, label the parts of the eye
found on the back of your notes.
Aqueous
humor
The End