2006-12-09 21:49:57 · 10 answers · asked by Anonymous in Health ➔ Diet & Fitness
its vitamin A
2006-12-09 21:57:30 · answer #1 · answered by Anonymous · 0⤊ 2⤋
Vitamin A prevents blindness. Nightblindness and dry eye are the kinds of blindness caused by a lack of vitamin A. The body uses vitamin A to make two chemicals the eye uses. Rhodopsin and Iodopsin. Rhodopsin is the major protein of the rod outer segment (ROS), a cellular domain which captures light and initiates the visual response. Rhodopsin is made in the rod inner segment (RIS) and is transported from there to the ROS on small membrane spheres called vesicles. We are studying how the cell forms these vesicles and transports them only toward the outer segment and not to the other end of the cell. Recent studies of retinal degeneration indicate that certain blinding disorders are associated with a disorder of this transport pathway. To study this pathway in depth, we have initiated these studies in frog retinas because their rod cells are very large and easily viewed in the light microscope. We use the GFP tag to make the proteins visible by fluorescence microscopy. If we shine bright blue light on the retinas and put a green barrier filter in the eyepieces, only the green light comes back out of the eye and is captured by the camera. We also counterstain the retinas with a red-fluorescing marker to outline the outer segments and the sides of the rods.
Also, color blondess could be caused by a lack of Cone receptors in the fovea and fovea centralis of the eye. Cone recpetors see color, rods see shades of grey.
2006-12-09 22:01:52 · answer #2 · answered by Anonymous · 1⤊ 0⤋
Colour blindness is nt caused due 2 d lack of vitamins.
People who r colour blind are usually born with d condition. It is causede by a partial or total absence of one or more of d three photo-pigments normally present in retina. The pigments r sentitive 2 d three primary colours (red, green and blue), so, if a pigment is missing, d eye cannot detect d colour.
Colour blindness can occasionally result from diseases of d eye or visual system suc as catarat, glaucoma, diabetes, optic nerve damage or brain tumour. In such cases, it is known as acquired colour blindness.
Many drugs affect colour perception, such as chloroquine (used 4 arthritis), digoxin (used 2 treat heart prblms), and ethambutol (used 2 treat tuberculosis).
Red or green colour blindness is most common colour blindness.
Mostly, colour blindness is congenital.
Thanx
2006-12-09 22:25:42 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Colorblindness is usually an inherited condition that is x-linked recessive. As a result, very few women are colorblind, but approximately 1 in 10 men has some degree of colorblindness.
Please see the web pages for more details on Colour blindness.
2006-12-09 22:11:45 · answer #4 · answered by gangadharan nair 7 · 0⤊ 0⤋
color blindness is not a vitamin deficency it is genetic,night blindness is caused by lack vitamin A
2006-12-09 21:59:35 · answer #5 · answered by dumplingmuffin 7 · 0⤊ 0⤋
Actually, it's vitamin F. If you don't get enough vitamin F, your body starts to crave it, and makes almost anything (especially at night) more appealing. A condition closely related to 'Beer Goggles'.
2016-03-13 05:20:07 · answer #6 · answered by Anonymous · 0⤊ 0⤋
It is usually genetic in origin and not by Vitamin deficiency!
2006-12-09 23:05:49 · answer #7 · answered by Rana 1 · 0⤊ 0⤋
Colour Blindness Is Due To
2017-02-20 14:02:17 · answer #8 · answered by ? 4 · 0⤊ 0⤋
i believe color blindness is a genetic trait.
2006-12-09 21:56:52 · answer #9 · answered by firenice 2 · 0⤊ 0⤋
is someone able to tell me what is the right answer for this question?
2016-08-14 07:02:23 · answer #10 · answered by Anonymous · 0⤊ 0⤋