physiology of the eye. 1. refraction the bending of light as it travels from less dense medium into...
TRANSCRIPT
![Page 1: Physiology of the Eye. 1. Refraction The bending of light as it travels from less dense medium into a more dense medium](https://reader036.vdocuments.site/reader036/viewer/2022081503/56649eb45503460f94bbcb08/html5/thumbnails/1.jpg)
Physiology of the Eye
QuickTime™ and a decompressor
are needed to see this picture.
![Page 2: Physiology of the Eye. 1. Refraction The bending of light as it travels from less dense medium into a more dense medium](https://reader036.vdocuments.site/reader036/viewer/2022081503/56649eb45503460f94bbcb08/html5/thumbnails/2.jpg)
1. Refraction
The bending of light as it travels from less dense medium into a more dense medium.
QuickTime™ and a decompressor
are needed to see this picture.
![Page 3: Physiology of the Eye. 1. Refraction The bending of light as it travels from less dense medium into a more dense medium](https://reader036.vdocuments.site/reader036/viewer/2022081503/56649eb45503460f94bbcb08/html5/thumbnails/3.jpg)
2. Divergence
Light rays spread out; Occurs with concave lenses
QuickTime™ and a decompressor
are needed to see this picture.
![Page 4: Physiology of the Eye. 1. Refraction The bending of light as it travels from less dense medium into a more dense medium](https://reader036.vdocuments.site/reader036/viewer/2022081503/56649eb45503460f94bbcb08/html5/thumbnails/4.jpg)
3. Convergence
Light rays come together; Occurs with convex lenses
QuickTime™ and a decompressor
are needed to see this picture.
![Page 5: Physiology of the Eye. 1. Refraction The bending of light as it travels from less dense medium into a more dense medium](https://reader036.vdocuments.site/reader036/viewer/2022081503/56649eb45503460f94bbcb08/html5/thumbnails/5.jpg)
4. Human Eye
Lens is Biconvex
QuickTime™ and a decompressor
are needed to see this picture.
![Page 6: Physiology of the Eye. 1. Refraction The bending of light as it travels from less dense medium into a more dense medium](https://reader036.vdocuments.site/reader036/viewer/2022081503/56649eb45503460f94bbcb08/html5/thumbnails/6.jpg)
5. Image on the retina
Upside down & reversed (inverted)
QuickTime™ and a decompressor
are needed to see this picture.
![Page 7: Physiology of the Eye. 1. Refraction The bending of light as it travels from less dense medium into a more dense medium](https://reader036.vdocuments.site/reader036/viewer/2022081503/56649eb45503460f94bbcb08/html5/thumbnails/7.jpg)
6. AccommodationThe ability of the lens to change its shape; helps to achieve sharp focus at close range (<20 ft)
QuickTime™ and a decompressor
are needed to see this picture.
![Page 8: Physiology of the Eye. 1. Refraction The bending of light as it travels from less dense medium into a more dense medium](https://reader036.vdocuments.site/reader036/viewer/2022081503/56649eb45503460f94bbcb08/html5/thumbnails/8.jpg)
7. Stereoscopic vision
The ability to see objects in three dimensions; important when driving, parking, climbing stairs, etc.
QuickTime™ and a decompressor
are needed to see this picture.
![Page 9: Physiology of the Eye. 1. Refraction The bending of light as it travels from less dense medium into a more dense medium](https://reader036.vdocuments.site/reader036/viewer/2022081503/56649eb45503460f94bbcb08/html5/thumbnails/9.jpg)
8. Peripheral vision
The ability to see to the sides without moving the head
The parts of the retina associated with peripheral vision do not contain cones, so sharp vision & color vision are not possible
QuickTime™ and a decompressor
are needed to see this picture.
![Page 10: Physiology of the Eye. 1. Refraction The bending of light as it travels from less dense medium into a more dense medium](https://reader036.vdocuments.site/reader036/viewer/2022081503/56649eb45503460f94bbcb08/html5/thumbnails/10.jpg)
9. Photoreceptor responsible for vision in dim light
Rods
QuickTime™ and a decompressor
are needed to see this picture.
![Page 11: Physiology of the Eye. 1. Refraction The bending of light as it travels from less dense medium into a more dense medium](https://reader036.vdocuments.site/reader036/viewer/2022081503/56649eb45503460f94bbcb08/html5/thumbnails/11.jpg)
10. Night blindness
Vitamin A deficiency can contribute to night blindness because it is responsible for converting retineene into rhodopsin; without enough Vitamin A, there is a slow return of dark adaptation
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
![Page 12: Physiology of the Eye. 1. Refraction The bending of light as it travels from less dense medium into a more dense medium](https://reader036.vdocuments.site/reader036/viewer/2022081503/56649eb45503460f94bbcb08/html5/thumbnails/12.jpg)
11. Bright light causes pain
Intense light bleaches rhodopsin & eyes need time to recover & become light adapted
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
![Page 13: Physiology of the Eye. 1. Refraction The bending of light as it travels from less dense medium into a more dense medium](https://reader036.vdocuments.site/reader036/viewer/2022081503/56649eb45503460f94bbcb08/html5/thumbnails/13.jpg)
12. Photoreceptor for fine focus & color vision
Cones
QuickTime™ and a decompressor
are needed to see this picture.
![Page 14: Physiology of the Eye. 1. Refraction The bending of light as it travels from less dense medium into a more dense medium](https://reader036.vdocuments.site/reader036/viewer/2022081503/56649eb45503460f94bbcb08/html5/thumbnails/14.jpg)
13. 3 primary colors of vision
Red
Green
Blue-violetQuickTime™ and a
decompressorare needed to see this picture.
![Page 15: Physiology of the Eye. 1. Refraction The bending of light as it travels from less dense medium into a more dense medium](https://reader036.vdocuments.site/reader036/viewer/2022081503/56649eb45503460f94bbcb08/html5/thumbnails/15.jpg)
14. True
• There are 3 types of cone receptors, each of which contains its own photochemical sensitive to one of the three wavelengths of primary colors.
QuickTime™ and a decompressor
are needed to see this picture.
![Page 16: Physiology of the Eye. 1. Refraction The bending of light as it travels from less dense medium into a more dense medium](https://reader036.vdocuments.site/reader036/viewer/2022081503/56649eb45503460f94bbcb08/html5/thumbnails/16.jpg)
15. True
• Equal stimulation of the 3 types of cones is perceived as white light.
QuickTime™ and a decompressor
are needed to see this picture.
![Page 17: Physiology of the Eye. 1. Refraction The bending of light as it travels from less dense medium into a more dense medium](https://reader036.vdocuments.site/reader036/viewer/2022081503/56649eb45503460f94bbcb08/html5/thumbnails/17.jpg)
16. Purkinje shift
Shift from light adaptation (cone reception) to dark adaptation (rod reception) at dusk & vice versa
QuickTime™ and a decompressor
are needed to see this picture.
![Page 18: Physiology of the Eye. 1. Refraction The bending of light as it travels from less dense medium into a more dense medium](https://reader036.vdocuments.site/reader036/viewer/2022081503/56649eb45503460f94bbcb08/html5/thumbnails/18.jpg)
17. Afterimages+ Afterimages: carryover of visual impressions is exactly the same as the original stimulus pattern
- Afterimages: carryover of visual impressions appear in a complementary color of the original
![Page 19: Physiology of the Eye. 1. Refraction The bending of light as it travels from less dense medium into a more dense medium](https://reader036.vdocuments.site/reader036/viewer/2022081503/56649eb45503460f94bbcb08/html5/thumbnails/19.jpg)
18. Visual AcuityThe sharpness or degree of detail the eye can see
Influenced by: brightness or intensity of light, size of object, color of object, and retinal area on which the image of the object falls