eyes are located in two sockets in the skull and moved by 3 pairs of muscles
the light enters the eyes through the cornea, which is transparent and at the front of the eye
then the light goes through the pupil
the cornea has a delicate and transparent layer in front of it called the conjuctiva
this kept moist by tear glands which 'wash' your eyes when you blink
process of seeing things
after the light enetering through the cornea, it passes through the lens and hits the retina
the retina contains cells called rods and cones which are sensitive to light.
as light hits and stimulates them, they send signals down the optic nerve to the brain.
your brain then interprets the impulses as images
the image is actually inverted but the brain has adapted to turning it the right way around
rod cells = react to dim light
cone cells = react to colour and detail
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