LFSC P1 - The Human Eye

Front

THE EYE

receptor cells found in the retina of the eye which are

sensitive to dim light and help to distinguish between

black and white

Back

rods

Front

receptor cells found in the retina of the eye which are

sensitive to bright light and help to distinguish between

different colours

Back

cones

Front

central opening within the iris which allows light to enter

Back

pupil

Front

regulation of the pupil size to control the amount of light

entering the eye

Back

pupillary mechanism

Front

the ability of the lens of the eye to alter its shape for clear vision when viewing both near and distant objects

Back

accommodation

Front

vision using two eyes with overlapping fields of view so that

the separate images are combined and interpreted as one image by the brain

Back

Binocular vision

Front

the ability to form three dimensional images which

provides the ability to judge distance, depth and the size of an object.

Back

Stereoscopic vision:

Front

Structure:tough, white inelastic layer that

covers eye towards the posterior

 

Function: protects inner structures &

maintains shape of the eye

Back

sclera

Front

Structure: Transparent layer in the front of the eye which

is convex (bulgy)

 

Function: Allows light to pass through &

 causes refraction (bending) of the

incoming light

Back

cornea

Front

Structure: dark coloured layer which

contains blood vessels and

pigments

 

Function: pigments absorb light to prevent

reflection of light

blood vessels supply nutrients,

oxygen to the cells of the retina

Back

choroid