PS102 Lecture 5: PS102 - 5
Document Summary
The visual sense: sight: the stimulus in vision is light energy. How the eye works: light waves enter the cornea. Cornea is protective outer layer: passes through the pupil. The pupil is a small opening in the eye: passes through the lens. The lens focuses the light waves: projected onto the retina. Retina contains all of the receptor cells (rods and cones) Cones allow us to see colour. Rods allow us to see better in low light. Optic nerve, and blind spot: optic nerve carries neural impulses from the eye to the brain, blind spot point where optic nerve leaves the eye. The retina: an extension of the cns: retina absorbs light, processes images, and sends information to the brain. Includes rods & cones: optic disk where the optic nerve leaves the eye. This break in continuity causes a blind spot.
