KINESIOL 4SS3 Lecture Notes - Lecture 10: Vitreous Body, Ciliary Muscle, Optic Disc

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Outer tunic (sclera (whites of eyes) and cornea (clear): gives shape and form, continuous between sclera and cornea, no blood supply and gets nourishment from aqueous humour. Vascular tunic (choroid, ciliary body and iris) also called the uvea: pupil allows light to enter the eye, starts where optic nerve enters the eye, front of choroid turns into ciliary body that goes around cornea. Contain ciliary muscles that are connected by ligaments to the lens: iris is muscular diaphragm coloured portion. Hole in centre for pupil where light enters: muscles change shape of lens. Anterior cavity aqueous humor: produced by cells of the ciliary body, provides nutrition for cornea. Posterior cavity vitreous humor: helps preserve eyeball shape, helps to hold lens and retina in place. Light focuses on cornea light passes through aqueous humor and pupil light enters lens light passes through vitreous humor image hits retina; information transmitted along optic nerve.

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