PSY 1101 Lecture Notes - Lecture 11: Color Blindness, Retina, Cornea

• School: University of Ottawa
• Department: Psychology
• Course: PSY 1101
• Professor: Kenneth Campbell

Document Summary

If a stimulus intensity remains constant, our sensory receptors adapt to it. We therefore no longer experience the sensation. Physics of light: electromagnetic signal whose wavelength varies from 400 to 700 nanometers (this is called light") Lens allows us to focus image on retina. Retina cones & rods, fovea, blind spot. Cones are packed in the center of the retina, near the fovea (where vision is most acute) Colour vision: three types of cones- for red, green and blue. A single cone may project to be a single bipolar cell. Output of the cone will have to be very high to activate the bipolar cell. The output is dependent on the intensity of the light. Need a great deal of light to see in colour. There are many more rods than cones but . The rods are spaced relatively far apart. Several rods project to a single bipolar cell. Thus, sensitive to very low levels of light.