PSYCH 1XX3 Chapter Notes - Chapter 4: Retinal Pigment Epithelium, Visual Cortex, Optic Disc
21 Feb 2016
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1/3 of the brain devoted o processing visual info. Eye primarily to collect, focus, and sense light stimulus. The stimulus light: amplitude: height of each wave. Greater the amp = more light being reflected/emitted so its more brighter/intense: wavelength: distance between the peaks. Larger wavelengths = lower frequency: the visible spectrum. Humans only sensitive to the visible spectrum. Bees can see in the ultraviolet spectrum see colours of flowers. Snakes can see in the infrared spectrum see prey emitting heat. Longest wavelength = 750 nanometers (red: purity: affects the perception of the saturation/richness of colours. Light made up as a pure wavelength is pure light and completely saturated. Desaturated: natural light or made up of many wavelengths. Not enough light reaching retina = pupils dilate. Too much light reaching retina = pupils constrict: after pupil, light pass through the lens (transparent structure that focuses the light onto the retina at the back of the eye)
