PSYC 215 Chapter Notes - Chapter 6: Blurry, Near-Sightedness, Optical Power
Document Summary
Human eyes (with other mammals, birds and reptiles) have single-chambered eyes. Cornea: the transparent membrane through which light enters a single-chambered eye. Pupil: the circular aperture formed by a muscular diaphragm (iris) in the eye, through which light passes after entering the cornea. Light > cornea > pupil > lens > retina (photoreceptor sheet) Aqueous humour: gel lling posterior chamber, maintain shape and hold retina against inner wall. Pumped into the eye continuously, entering eye near attachment of lens and leaving near. Entire volume is replenished every 45 minutes. The angle an object (0) subtends at the centre of a lens. It is used to measure the size of an object as a stimulus for vision. Depends on: iris: size of object (s, viewing distance (d) Nodal point = where the light rays converge. Nodal point of lens allows light rays to pass without being refracted. Angle subtended by image on retina = angle subtended by object at nodal point.
