BIOD27H3 Lecture Notes - Lecture 15: Mitochondrion, Ciliary Muscle, Cone Cell

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The eye is a hollow sphere divided into 2 compartments separated by the lens. Compartments contain aqueous humor and vitreous humor. Lens and cornea focus light on the retina. Bending of the lens is controlled by zonules and cilary muscles. Retina contains blood vessels, photoreceptors, optic disk, fovea. Vision: amount of light modulated by the pupil, can change from 1. 5mm 8mm in diameter: 28 fold. Light enters eye through the cornea difference in pupil area. Lens focuses light waves on the retina, muscles that control the lens to focus light cause the lens to change shape: photoreceptors of the retina transduce light energy into an electrical signal, electrical signal processed through neural pathways. Ciliary muscles and zonules/ligaments control lens shape: distance from centre of lens to focal point = focal length. Light converges on the retina at the focal point.

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