Perception - Perception 12:38 o Retinal Lightsensitive...

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Perception 12:38 Transduction of light into nerve impulses Receptors have outer segments which contain o Visual pigment molecules which have two components Retinal Light sensitive Becomes erect when light is present Anchored on opsin molecules Opsin o Once one visual pigment molecule is stimulated, an enzyme cascade  (chain reaction) is triggered throughout about a thousand more molecules  in the brain Retinal processing Rods o Large and cylindrical o Peripheral retina consists mostly of cones o 120 million rods Cones o Small and tapered o Fovea consists solely of cones o 5 million cones Blind spot o About 20 degrees towards the nasal lies a blind spot in the fovea o The image from one eye compensates and covers the blind spot of the  other one Measuring dark adaption o Experiments Person is light adapted
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Putting them in a dark room Light is turned off
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