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Light and Vision

Light and parts of human eye

TermDefinition
Sclera The white of the eye
Rods The light sensitive cells that help to differentiate gray, white, and blacks
Cones The color sensitive cells that may be absent in some
Retina A multilayered membrane that covers the inside back of the eye that contains rods and cones
Cornea The front transparent layer that refracts the light first as it enters the eye.
Aqueous Humor A watery fluid that provides nourishment to the eye.
Vitreous Humor A gel like substance that maintains pressure and gives shape to the eye.
Iris The colored part of the eye that controls the amount of light
Pupil The hole through which the light enters the eye
Optic Nerve It sends messages from the eye to the brain
Lens Transparent biconvex structure that helps the eye to focus the image
Reflection When light bounces off an object
Refraction When light bends from one medium to another
Diffraction When wave bends around corners
Opaque Objects through which light can not pass through and is reflected or absorbed.
Translucent Objects through which light partially passes through
Transparent Objects through which light can pass through
Convex a surface that is curved outward (light waves become focused)
Concave Surface through which light waves spread out
Created by: Sanand