The Human Eye Vocab

Nearsightedness

you can see things near to you

where the image doesn’t focus correctly on the retina, leading to blurry vision

Farsightedness

you can see things far away

where the image doesn’t focus correctly on the retina, leading to blurry vision

transduction in the retina

the retina converts light into neural signals through photoreceptors

photoreceptors

cella inside your retina that react to light and change light energy into an electrical signal

cornea

the clear outer layer at the front of the eye, it helps focus light coming into the eye.

iris

the colored part of the eye surrounds the pupil, it changes the size of the pupil to regulate light entry

pupil

the black circle in the middle of your eye. it controls how much light enters the eye by getting bigger or smaller

lens

a clear flexible structure behind the pupil. it bends to focus light onto the retina

retina

the back of the eye where light is turned into signal’s. it contains rods and cones that help us see

fovia

a small area in the center of the retina where vision is the sharpest, used for detailed task like reading

optic nerve

the nerve that sends visual information from the eye to the brain for processing. electro-chemical neuron

cones

allows you to see color

rods

detect light and can be activated in lower light but do not allow very detailed vision. when you look in a dimmed dark room. you see shapes but everything will be in black and white

trichromatic theory

The retina contains three types of color scepters, red green blue, in their combination, allows us to perceive the full color spectrum

opponent process theory

your brain sees color using opposite pairs

red-green

blue-yellow

black white

monochromatic

the person sees everything in the shade of one color

dichromatism

when the person is missing one of the three typical cones

two types of cones