Quote:
Originally Posted by NIB
I can write NIB in the snow..
I also do snow angels.  |
there's a $10,000 dollar fine for doing those
In many respects, the typical fish eye is remarkably comparable to a human’s. Just as in the human eye, a fish’s eye is similar to a camera. Light rays enter the eye and are picked up by the lens, the transparent center of the eyeball. The lens directs the light rays to the back of the eye and focuses them on a light-sensitive screen called the retina.
The human eye has an iris, or diaphragm, in front of the lens that opens and closes depending on the amount of light entering the eye. The iris in a fish’s eye is fixed. It is an opaque curtain of tissue with a small hole in the center. The iris allows light to enter the eye through the fixed center aperture only, while blocking out light coming in from beyond the edges of the fish’s field of vision. Receptor cells in the retina make adjustments to any changes that may occur in the brightness of light.