recap

1. Perception Thursday 20 th April 2006 Starter activity Draw a rough sketch of two visual illusions, and explain it…..

2. Learning objective To recap what we have learnt so far about perception To be able to explain everyday distortions

3. The Big Picture So far we have covered…. The visual System The difference between sensation and perception Visual illusions Perception of distance

4. The pupil The retina The cornea The lens Optic nerve The iris

6. The cornea The pupil The lens The retina The optic nerve Focuses or bends light and protects The eye. The hole in the iris through which light waves pass. Its size is adjusted by the iris. Focuses the light onto the area of visual acuity. Converts light energy into electrical Impulses. Transmits the electrical impulses to the Visual cortex in the brain for decoding

7. Perception of distance Binocular Depth Cues This is when we use two eyes…. What is retinal disparity? What is ocular convergence

8. Monocular cues When we use one eye to perceive distance we have To rely on environmental cues to help us

9. Picture Linear perspective Height in the visual field Relative size Overlap Cue

10. Size constancy Higher paper Read the text in front of you….. What is size constancy? What is constancy scaling? Complete the table

11. Perceived movement Perceived distance Perceived size Examples Everyday distortions

12. Plenary So far we have covered…. The visual System The difference between sensation and perception Visual illusions Perception of distance (Binocular and monocular cues) Everyday distortions Factors affecting perception

13. The visual system The different parts of the eye and their functions Visual illusions Perception of distance Binocular and monocular cues Everyday distortions Factors that affect perception