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Optical Illusion
This document summarizes the key parts and functions of the human eye and how vision works. It discusses the main structures of the eye like the cornea, iris, pupil, lens, retina and optic nerve. It explains that light is detected by the retina and converted to nerve impulses which are sent via the optic nerve to the brain for processing. The brain does the heavy lifting of analyzing, recognizing and making sense of visual inputs. Optical illusions demonstrate the limitations of sight and how what we perceive can differ from what our eyes actually see.
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Optical Illusion
- 1.
- 2.
- 4. Let us startwith EYESssss
- 5. 1. Sclera = Skinof the eye = Protection 2. Cornea = window of the eye =refracts light 3. Iris = the coloured part of your eye = control amount of light 4. Pupil = the HOLE Lens = refracts and focus light Retina Optic Nerve
- 6. Fovea Retina: 1. Detectlight stimulus 2. Converts light detected to nerve impulses
- 7. CONES & RODS?? Photoreceptors lahhhh
- 9. Optic Nerve The USBcable from your eye to your BRAIN = Send nerve impulses from retina to brain
- 10. GOT IT? You seewhat your BRAIN sees.
- 11.
- 12. HOW?? Because 50% ofyour brain is used for vision!! Massive processor, decidated for: 1. Detect 2. Analyze 3. Recognize 4. Reason with visual input
- 13. What about this? Quick!Find the blue circle!
- 14. Optical Illusion Limitation ofsight The shift between what your EYE see, and what your BRAIN perceives (what you brain “see”)
- 15. What colour isthis dress??
Editor's Notes
- #6 The cornea is the transparent, dome-shaped window covering the front of the eye. It is a powerful refracting surface, providing 2/3 of the eye's focusing power. Like the crystal on a watch, it gives us a clear window to look through.
- #7 Retina The retina is a multi-layered sensory tissue that lines the back of the eye. It contains millions of photoreceptors that capture light rays and convert them into electrical impulses. These impulses travel along the optic nerve to the brain where they are turned into images. There are two types of photoreceptors in the retina: rods and cones. The retina contains approximately 6 million cones. The cones are contained in the macula, the portion of the retina responsible for central vision. They are most densely packed within the fovea, the very center portion of the macula. Cones function best in bright light and allow us to appreciate color. There are approximately 125 million rods. They are spread throughout the peripheral retina and function best in dim lighting. The rods are responsible for peripheral and night vision.