Psychology 1000 Lecture Notes - Lecture 12: Red, Lateral Inhibition, Retina Horizontal Cell

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Dr.Mike

Document Summary

How can we explain phantom spots: duplex theory- two kinds of visual receptors, 120 million rods, 7 million cones. Operate at low intensity- sensitive for brightness. Looking at shooti(cid:374)g star a(cid:374)d the(cid:374) it"s go(cid:374)e= di(cid:373) light sour(cid:272)e, (cid:374)ot (cid:271)right e(cid:374)ough if you want to see dim light look with peripheral vision. Operate at higher intensities- (cid:862)i(cid:374)se(cid:374)sitive(cid:863) for (cid:271)right(cid:374)ess. Rods: rhodopsin: no exposure to light= red colour, exposure to light= makes it orange, breaks down, eventually will go clear this is called bleached. Cones: chlorolable= green, erythrolabe= red, cyanolabe= blue. Put in dark room and let you sit there for around 20 mins put a very powerful strobe light and flash it at your eyes- this bleaches your retina. You are going to tell me when you see it. Once you see it you turn down intensity dark adaptation curve. Rod-cone break- time it takes to switch over (takes about 10 mins: spectral sensitivity: