NEUR 3200 Lecture Notes - Lecture 5: Opsin, Retinal Ganglion Cell, Retinal Pigment Epithelium
17 Dec 2017
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Document Summary
Wavelength - the distance from one peak to the next peak. Cornea doesn"t have blood vessels, there is sensory nerve bres. Pupil isn"t an actual structure, it"s the hole in this iris. When the ciliary muscle relaxes, the lens atens, and the light refracts less (further back objects) When ciliary muscle contracts, reduces tension in lens, lens bulges, causes more refraction (for close up objects) Needs to be close to the pigmented epithelium. Pigmented epithelium contains pigments and light absorbing materials. Ganglion and bipolar cells are relatively transparent. Stacks of disks for more surface area. More surface area = more sensitive (thats why cones are rods are more sensitive then cones) New disks are made and recycled by the pigment epithelium. Short, medium, and long wavelengths (red, green, and blue) More detail in the centre of eld of vision. More densely packed cones in the middle. Retinal eccentricity = distance from the retina.
