2007-12-27 05:34:42 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Images are not recorded there because it is the location on the retina where the optic nerve leads to the brain. The retina has no light sensors here, so it cannot convey images to the brain.
2007-12-27 05:41:40 · answer #1 · answered by twinkletoes 3 · 2⤊ 0⤋
Our brains manufacture a best guess to fill in the missing data. If the blind spot is in the middle of a checker-board pattern, the missing squares are presumed to be there. As for why? I suppose cave men probably were more successful hunters if they didn't have to think about what might be hiding in the missing bit of tall grass.
Beg your pardon! I thought you asked why images ARE recorded in the blind spot. We have a blind spot because there has to be an output cable of nerves to the brain, and evolution just didn't find it necessary to put a big bulge in the back of the eyeball so that the nerve bundle wouldn't have to interrupt the array of receptors inside. Such a bulge in back might have interfered with movement of the otherwise spherical eyeball in its socket.
2007-12-27 15:33:23 · answer #2 · answered by Anonymous · 0⤊ 0⤋
This corresponds to the place in the eye where the optic nerve bundle penetrates the retina, so there are no light receptors there. This could have been avoided if the nerve just stayed behind the retina, sending dendrites inward to the receptors. This is a wonderful example of evolution "locking in" a non-optimal configuration because it would require a topological inversion of the eye's anatomy, which no series of small incrementally advantageous changes could make. This is one reason why ID'er stopped going on about the eye and moved onto the bacterium flagellum.
2007-12-27 14:02:39 · answer #3 · answered by Dr. R 7 · 0⤊ 0⤋
Blind spots can be due to many reasons.
But mainly missing surface to catch the image on. Damage retina.
If it is a damaged lens then still there is no image, to record on the retina.
2007-12-27 13:41:28 · answer #4 · answered by minootoo 7 · 0⤊ 2⤋
because there are no light sensors in the blind spot
2007-12-28 00:56:10 · answer #5 · answered by yesvee 2 · 0⤊ 0⤋
because it is a blind spot
2007-12-27 13:58:38 · answer #6 · answered by Matthew 1st Gospel 4 · 0⤊ 2⤋
this is because there are no light sensitive cells there....
2007-12-28 04:16:05 · answer #7 · answered by matrixboy m 1 · 0⤊ 0⤋