PSYB51H3 Chapter Notes - Chapter 2: Refractive Error, Far-Sightedness, Dioptre
Document Summary
The first steps in vision: from light to neural signals. It is equal to the reciprocal of the focal length, in metres. Retinal information processing: the retina has five types of neurons, 1. The ability to perceive the sense of organs, 2. Extreme responsiveness to radiation, especially to light of a specific wavelength, 3. In the cat eye: mapped out receptive fields of individual retinal ganglion, visual stimulus = light, light was moved around the retina, 1. When the light was shone on a specific small region of the retina, the ganglion cell increased firing: 2. When the spot was moved to an adjacent spot it decreased its firing: 3. Sensitive & perception in everyday life: when good retina goes bad, age-related macular degeneration (amd) a disease associated with aging that affects the macula. Amd gradually destroys sharp central vision, making it difficult to read, drive, and recognize faces.
