Cornea, transparent, avascular tissue at front of eye where light first enters, provides 43 diopters of focusing power, comprised of 5 transparent layers (EBSDE), Crystalline lens, transparent, biconvex structure behind iris, provides 20 diopters of focusing power, comprised of 3 layers: capsule, cortex, nucleus, Retina, contains photoreceptors: cones and rods, light-sensitive area lining back of eye, converts light into detailed colour images, Optic disc, contains NO photoreceptors, also known as the blind spot, exit point for nerve cells from the eye, Iris, shutter mechanism of the eye, coloured circular membrane behind the cornea, regulates amount of light entering the pupil, Ciliary body, produces aqueous humor that fills anterior and posterior chambers, contraction of muscles here changes lens shape, zonular fibers connect to its muscles to the lens

W1 Eye Structures sorting

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