PSYC 106 Lecture Notes - Lecture 9: Retinotopy, Retina, Cornea
Document Summary
Photons: particles of energy emitted from atoms that travel through space as a wave. Iris: colored area, a muscle that makes your pupil tiny or bigger. Lens: both lens and cornea make a sharp image of the pencil on the back of ur eyeball. Retina: back of the eye, contains neurons, photoreceptor neurons, has a picture of whatever you are looking at but upside down. Phobia: center of the back of your eye, it"s where you have the highest density of cone photo receptors. (retinal) ganglion cells: their axons leave the eye to form the optic nerve (cranial#2) Most of the vasculature (blood vessels) is near them because photoreceptors need extra food. Photoreceptors in the retina: first neurons in the visual chain. They respond to the light that makes up the image of an object (pencil) on teh retina. Visual pigment absorbs light, which results in a change in the membrane potential.
