PSYC 2220 Lecture Notes - Lecture 2: Macular Degeneration, Purkinje Effect, Ganglion Cell
14 Oct 2015
School
Department
Course
Professor
Document Summary
Energy: wave length spectrum range from short-wave length gamma rays to long wavelength radio waves. Stimuli light reflection pupil focus by cornea and lens image on retina rod and cones transduce the electromagnetic information to electronic information optic nerve carry the information from retina to the brain. Cornea = 80% of focusing, it is fixed. Lens = 20% of focusing, adjust for object distance accomodation. Eyes problems: presbyopia old eyes : mostly due to aging, image focus behind of retina. Hardening of lens and weakening of ciliary muscles-aging. Myopia: short-sighted, image focus in front of retina. Cornea or lens bends too much light refractive myopia. Eyeball too long eye ball to long. Solution: lenses, lasik surgery scar tissue can cause starring causing difficulties with night driving. Constant accommodation for nearby objects can lead to eyestrain and headaches. Receptor processing: pigment molecules: within a receptor main task is to transduce light to electric energy in neuron.
