Bild2Lec7

Bild2Lec7 - Figure 49.18 Structure of the vertebrate eye...

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Figure 49.18 Structure of the vertebrate eye Ciliary body Iris Suspensory ligament Cornea Pupil Aqueous humor Lens Vitreous humor Optic disk (blind spot) Central artery and vein of the retina Optic nerve Fovea (center of visual field) Retina Choroid Sclera
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Figure 49.19 Focusing in the mammalian eye Lens (flatter) Lens (rounder) Ciliary muscle Suspensory ligaments Choroid Retina Front view of lens and ciliary muscle Ciliary muscles contract, pulling border of choroid toward lens Suspensory ligaments relax Lens becomes thicker and rounder, focusing on near objects (a) Near vision (accommodation) (b) Distance vision Ciliary muscles relax, and border of choroid moves away from lens Suspensory ligaments pull against lens Lens becomes flatter, focusing on distant objects
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Figure 49.20 Rod structure and light absorption Rod Outer segment Cell body Synaptic terminal Disks Inside of disk (a) Rods contain the visual pigment rhodopsin, which is embedded in a stack of membranous disks in the rod’s
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This note was uploaded on 04/02/2010 for the course BILD 2 taught by Professor Schroeder during the Spring '08 term at UCSD.

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Bild2Lec7 - Figure 49.18 Structure of the vertebrate eye...

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