Psychology 2015A/B Lecture 3: The Eye

• School: Western University
• Department: Psychology
• Course: Psychology 2015A/B
• Professor: John Campbell

Document Summary

The eye: known the major parts (pupil, cornea, lens, optic nerve, rods and cones, the eye contains receptors for vision. Shape: rods: large and cylindrical, cones: small and tapered, distribution on retina, fovea consists solely of cones, peripheral retina has both rods and cones, more rods than cones in periphery. Fovea and small surrounding area are destroyed: creates a "blind spot" on retina, most common in older individuals. Retinitis pigmentosa: genetic disease, rods are destroyed first. Number: about 120 million rods and 6 million cones. Blind spot: place where optic nerve leaves the eye: we don"t see it (cid:271)e(cid:272)ause, one eye covers the blind spot for the other. It is located at edge of the visual field: the brain "fills in" the spot. Adapting to the dark: dark adaption is the process of increasing sensitivity in the dark, measured by determining a dark adaptation curve.