LING 1200 Lecture Notes - Lecture 32: Peripheral Vision, Retina
13 May 2017
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Document Summary
If dark outside, iris dilates (open up pupil) letting more light in. Dilated pupil is sign of interest (sexual interest) in regular lighting. Patch of sensory receptors at the back of the eye. Detect the amount of light reflected from different parts of the visual field. Receptors away from the center report on periphery of the visual field. Receptors closer to the center report on the central part of the visual field. Preserves location of objects in the visual field. Most numerous away from the center (fovea) of the retina. Reason you can see in the dark. Responsible for vision in poor lighting conditions and peripheral vision. Most numerous at the center (fovea) of the retina. Responsible for vision in good lighting conditions and focused vision at the center of the visual field. Photoreceptors adapt to change from bright to dim lighting conditions. Cones do it quickly, but are not very sensitive to dim light (10 mins to adapt)
