PSYCO275 Lecture Notes - Lecture 13: Cortical Column, Ommatidium, David H. Hubel

• School: University of Alberta
• Department: Psychology
• Course: PSYCO275
• Professor: Clayton Dickson

Document Summary

Eye position: eyes come in pairs, eyes on both sides. Can see in every direction: eyes are in front. No backwards view though - sacrificed that. Creates 3d perceptions from 2d retinal images. Each point of the image you are seeing corresponds to a point on either retina. However, correspondence is not perfect, because each eye views the world from a different position. Binocular disparity: 2 eyes to determine 3d structures. We see 2d structures, but our visual system perceives it as 3d by reconstructing it in the brain. Helps with perception of distance: difference of the location of the image between the two eyes. Eye movement: since the cones are heavily packed in the fovea, our eyes need to move continuously in order to have good colour and detailed vision. Visual perception = summation of all visual info we see at the moment: involuntary fixational eye movements. Tremors: your eyes jiggles a bit wherever you"re looking at.