Optical Illusion
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Optical Illusion and human eyes structure
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Optical Illusion
- 4. Let us start with EYESssss
- 5. 1. Sclera = Skin of 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. Detect light stimulus 2. Converts light detected to nerve impulses
- 7. CONES & RODS ?? Photoreceptors lahhhh
- 9. Optic Nerve The USB cable from your eye to your BRAIN = Send nerve impulses from retina to brain
- 10. GOT IT? You see what your BRAIN sees.
- 11. Easy?
- 12. HOW?? Because 50% of your 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 of sight The shift between what your EYE see, and what your BRAIN perceives (what you brain “see”)
- 15. What colour is this dress??
Editor's Notes
- 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.
- 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.