Vision

Retina

Light-sensitive inner surface of the eye containing photoreceptor cells that convert light into neural signals

Foves

Central area of the retina responsible for sharp central vision

Blind spot

Area on the returns where the optic nerve exits the eye, lacking photoreceptor cells

Rods

Photoreceptor cells responsible for vision in low light conditions and detecting motion

Cones

Photoreceptor cells responsible for color vision and detail in bright light

Bipolar cells

Neurons in the retina that transmit visual information from photoreceptors to ganglion cells

Ganglion cells

Neurons that receive visual information from bipolar cells and transmit them to the brain via the optic nerve

Lens

Transparent structure in the eye that focuses light onto the retina

Accommodation

Lens of the eye that change shape to focus on objects at different distances

Near sighted

Long eye ball, curved cornea, light focused in front of the retina

Far sighted

Short eye ball, flat cornea, light focused behind the retina

Trichromatic theory

Color vision is based on the 3 cone receptors

Opponent process theory

Color vision is based on pairs of opposing color processes

Afterimage

Visual sensations that persist after the stimulus is removed

Dichromatic

Only having 2 functioning cone cells

Monochromatic

Only having 1 functioning cone cell