BCS 110 Lecture Notes - Lecture 8: Amacrine Cell, Visual System, Ganglion Cell
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Thursday, september 29, 2016 9:41 am: proper(es of light. No light = no vision: light can be thought of in 2 di erent ways. Waves (light comes in di erent wavelengths: visible light (for humans) is waves of electromagne(c energy between 380-760 nm. Intensity = brightness (percep(on: humans only see small part of the spectrum of wavelengths. Pupil: iris- donut-shaped bands of contrac(le (ssue that gives the eye its color, light enters the eye through the pupil (hole in the iris, pupil changes size in response to changes in illumina(on (sensi(vity, acuity, the lens. Focuses light on the re(na: ciliary muscles alter the shape of the lens as needed, accommoda(on- the process of adjus(ng the lens (bending of light; will fazen up to bend light bezer) Presbyopia- freezes the lens for either far or close objects (comes with age) Binocular vision (depth: convergence- eyes must turn slightly inward when viewing objects.