Eye structure

Front

White external layer of the eyeball?

Back

Sclera

Front

Transparent part of the coat of the eyeball that covers the iris and pupil and admits light to the interior?

Back

Cornea

Front

Colored part of the eye; contracting muscles that regulates the size of the pupil?

Back

Iris

Front

Opening in the iris, which admits light into the interior of the eye?

Back

Pupil

Front

Watery fluid; fluid that fills the space between the lens and the cornea?

Back

Aqueous humor

Front

Jelly-like fluid that fills the eyeball behind the lens?

Back

Vitreous humor

Front

Helps to focus the light rays onto the back of the eye?

Back

Lens

Front

Sensory membrane that lines most of the large posterior chamber of the eye?

Back

Retina

Front

Photosensitive receptors in the retina responsive to faint (dim) light?

Back

Rods

Front

Photosensitive receptor cells of the retina that function in color vision (bright)?

Back

Cones