pupil - allows light to enter the eye, iris - controls the amount of light that enters the eye, cornea - protects the eye and refracts light onto the lens, lens - focuses/ refracts light onto the retina, ciliary muscles - changes the shape of the lens, sclera - provide structure and protects the eye, retina - contains photoreceptors which detect light rays and generate action potential, optic nerve - relays information from the retina to the brain, choroid - contain blood vessels and nourish the eye, fovea - gives sharp central vision, optic disc - where the optic nerve leaves the eye, lateral and medial rectus muscles - moves the eye, vitreous and aqueous humour - helps hold the shape of the eye, photoreceptors - generates action potential in the retina,

function of parts of the eye

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