PSY 3301 Lecture Notes - Lecture 2: Optic Disc, Optic Nerve, Color Vision

• School: University of Ottawa
• Department: Psychology
• Course: PSY 3301
• Professor: Andra Smith

Document Summary

Analyzes light, sensing changes in illumination that are rapid in time and localized in space. Converts light into action potential (excitation or inhibition of cells) Sclera: forms the eyeball, the white of the eye. Retina: light sensitive surface in the back of the eye consisting of neurons and photoreceptor cells. Fovea: region of sharpest vision and has the densest distribution of photoreceptors specialized for color; centre of retina. Pupil: opens and closes to allow more or less light through the black hole. Cornea: eye"s clear outer covering, bends light. Lens: muscles around it focuses light rays to project a backward, inverted image on a light-receptive surface. Optic disc: where blood vessels enter the eye and the axons that form the optic nerve leave the eye, has no receptors and forms a blind spot. Optic nerve: conveys information from the eye to the brain. Lens focuses incoming light directly on the retina.