Diapositiva PPT
Image acquisition:
- Retina: Composed of
- 100 M. Rods: Long slender receptors.
Sensitive at low levels of light.
- 6.5 M. Cones. Shorter and thicker receptors.
Sensitive at high levels of light.
Greatest presence at the Fovea region (sharpest vision).
- Three types of cones with different wavelength absorption with peaks in the blue, green and red light spectrum
- Light stimulus activate a rod or cone producing a nerve impulse which is transmitted through the optic nerve.
More information at: http://www.vision.ca/eye/lobby.html