psych eye

cornea

where the light first enters your eye (dialation and constriction)

iris

colored muscle tissue around the pupilthat controls the size of the pupil, regulating light entry.

lens

Helps focus images onto the retina in a process called accomodation. When this process is altered, results in myopia and hyperopia.

retina

photosensitive surface at the back of the eye. Contains the photorecpetor rods and cones for transduction.

fovea

the central focal point on the retina, helps us to see clear and sharp

blind spot

no receptor cells are located. Where the optic never leaves the eye and the brain fills in gaps.

Ganglion Cells

transfers what we see to the optic nerve and then to the brian

optic nerve

carries neural impulses from the eye to the thalamus, then to the visual cortex

Rods

Found in the periphery of the retina, away from the fovea. Helps us to see black and white, in low light conditions, and shapes and movement.

cones

found near the fovea. Helps us to detect fine detail and color and to see in higher light conditions.