PSY 205 Lecture Notes - Lecture 4: Retina, Color Vision, Peripheral Vision

• School: Syracuse University
• Department: Psychology
• Course: PSY 205
• Professor: Shannon Houck

Document Summary

Perception: the selection, organization, and interpretation of sensory input. 4. 1 - the visual system: essentials of sight. The stimulus: light: light is a form of electromagnetic radiation that travels as a wave. Varies in amplitude (height) and wavelength (distance between peaks) Amplitude affects mainly the perception of brightness. Wavelength affects mainly the perception of color. The eye: a living optical instrument: lens. A transparent eye structure that focuses the light rays falling on the retina. Occurs when the curvature of the lens adjusts to alter visual focus. Lens gets rounder when the object is close. Lens gets flatter when object is more distant. Close objects are seen clearly but distant objects are blurry. Occurs because the focus of light from distant objects falls a little short of the retina. Focusing problems occurs when the cornea or lens bends light too much or when the eyeball is too long. Distant objects are seen clearly but close objects are blurry.