PSYCH 1XX3 Lecture Notes - Lecture 8: Retinal Pigment Epithelium, Optic Disc, Visual Acuity
18 Apr 2017
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Document Summary
1/3 of brain devoted to processing visual information. What we see is a product of our brain activity. The eye is primarily an instrument to collect, focus and sense the light stimulus. Light can vary with respect to brightness, colour and saturation: amplitude and brightness: Amplitude the height of each wave. The greater the amplitude of the light wave, the more light is being reflected or emitted by that object, and so that object appears brighter or more intense to us: wavelength and colour: Wavelength the distance between peaks in successive waves. Smaller wavelength; refer to light waves with higher frequency because less distance between successive peaks: wavelength measured in nanometers, larger wavelengths refer to light waves with a lower frequency. Visible spectrum (360nm(violet) 750nm(red)): humans are only sensitive to a tiny portion of total range of wavelengths of electromagnetic radiation. Uv: a bee would see a flower normally in uv light.
