PSYC 100 Lecture Notes - Lecture 9: Color Vision, Ganglion Cell, Color Blindness

• School: Queen's University
• Department: Psychology
• Course: PSYC 100
• Professor: Jill Atkinson

Document Summary

Vision is the detection of light: light is a form of electromagnetic energy. Describe the visual system from eye to cortex: anatomy, cornea transparent covering that is primarily responsible for bringing light into the eye and also acts as a lenses to focus light. Since the shape of the cornea can"t really change, only one focus is possible: pupil admits light, allowing it to hit the back of the eye (the retina). The iris changes size to increase or decrease the amount of light that enters: lens transparent structure located behind the pupil. The lens becomes more curved to focus on close items and less curved for far items. The ability of the lens to change shape declines with age which is why we need glasses later in our lives: retina the inner surface of the back of the eye. This is where the light receptor cells (photoreceptors) are located.