Vision

Retina

back inner surface of the eye where transduction takes place

Blind Spot

the point where the optic nerve leaves the eye-no receptor cells are located there

Cornea

eyes clear, protective outer layer

Pupil

center of eye through which light passes

Iris

colored portion of eye around the pupil that controls size of pupil

Lens

structure behind pupil that changes shape to help focus images into retina

Accommodation

when the lens changes shape to focus on images

What is accommodation and how is it related to sightedness?

nearsightedness and farsightedness occur when

accommodation is altered

Fovea

the area of sharpest vision

Optic Nerve

carries visual information from the retina to the brain

Ganglion Cells

processes visual information and transmit it as electrical impulses to the brain

Color Vision Deficiency Types

three main categories based on the cone cells (red, green, or blue)

Young-Helmholtz Trichromatic Theory

the retina had 3 types of cones, each sensitive to light in the red, blue, or green wave lengths

Afterimages

an optical illusion or visual sensation that continues in the eye or mind after the original light source or object is no longer present

Opponent-Process Theory

idea that bipolar cells in the visual system process colors in complementary pairs

Prosopagnosia

face blindness-facial neural network doesn't develop properly

Blindsight

all the parallel processing pathways are damaged except for movement