Parts of the eye

Sclera

supports and protects delicate photocells

cornea

refracts light towards the pupil

aqueous humour

supplies cornea with nutrients and refracts light

choriod layer

contains blood vessels that nouris hte retina

iris

regulates the amount of light entering the eye

vitreous humour

maintains the shape of the eyeball and permits light transmission to the retina

lens

focuses the image on the retina

pupil

the ooening in the iris that allows light into the eye

retina

contains rods used for viewing in dimlight and cones used for identifying colour

fovea centralis

most light-sensitive area of the retina. Contains only cones

Blind spot

where the optic nerve attaches to the retina