Anatomy of the Eye

Iris

gives the color of our eyes and contracts the pupil

Choroid

provides nutrients and oxygen to our eyes, located between the retina and sclera

Ciliary Body

holds the lens in place

Retina

internal layer (light sensitive tissue is the back of the eye) that goes all around and holds the receptors in the eye

Rods

photoreceptors that detects light and dark and is very sensitive to low level light in the eye

Cones

photoreceptors that detects colors in the eye

Back of Retina

where the photoreceptors are located

Fovea

densely saturated with cone photoreceptors

Blind Spot (Optic Disk)

no photoreceptors located where the optic nerve and blood vessels leave the eyeball

Pathway of Visual Information

stimulus of light, photoreceptors, optic nerve, visual cortex, interpretation

Orbital Rim

where the eye is inserted or located in the head

Bony Orbit

a cushion of fat and walls that enclose and protect the eye

Color Blindness

a genetic condition caused by a difference in how one or more of the light sensitive cells found in the retina of the eye respond to certain colors

Mild color Blindness

when all 3 color sensing cones are present, but one cone cell does not work properly

Severe Color Blindness

when all 3 color sensing cones are absent, not working, or detects a different color than normal

Lens

focuses the light into the retina

Tapetum

a second lining that helps you see better in the dark