PSY 250 Lecture Notes - Lecture 12: Scotopic Vision, Rhodopsin, Photopic Vision
23 Mar 2016
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Document Summary
Sill need some source of light but can see well in the dark. Visual ield: the extent of visual space seen by each eye. Visual acuity: the ability to disinguish between two nearby points in space (i. e. , visual resoluion) Visual transducion: convering light energy into neural signals. Binocular disparity: the diference in the posiion of the same image on the two reinas helps the brain create 3d/depth percepion. Cellular structure of the reina: reinal ganglion cells, bipolar cells, amacrine cells, horizontal cells, photoreceptors. Cones: color (photopic) vision; predominant in bright lighing; high acuity- provide both color and detail; greater concentraion of cones in the fovea. Rods: black and white (scotopic) vision; predominant in dim lighing; high sensiivity but lack acuity; greater concentraion outside the fovea. Rods and cones difer in their convergence raio (raio of receptor cells to ganglion cells) High convergence: makes it more sensiive to light, but is less precise.
