Night blindness, also known as nyctalopia, is the inability to acclimatize to dim lighting conditions. Some people become more nearsighted at night as the pupil dilates in dark conditions, a condition called spherical aberration. When a person is unable to see well enough to distinguish distinct images in low lighting conditions, night blindness results.

Vision problems can develop before a baby is born. Sometimes, parts of the eyes don't form the way they should. A kid's eyes might look fine, but the brain has trouble processing the information they send. The optic nerve sends pictures to the brain, so if the nerve doesn't form correctly, the baby's brain won't receive the messages needed for sight. Blindness can be genetic or inherited, which means that this problem gets passed down to a kid from parents through genes.

Distance is one of the major factors in determining blindness, with the second being the visual field. A normal person has a visual field of 180 degrees, with someone who is blind having merely 20 degrees. Alot of times we assume that when someone is legally blind that they cannot see anything at all. This assumption holds true in ten percent of cases, with the rest having some vision. Even just some light perception accounts for vision.

Researchers have looked at the benefit of individual nutrients for fighting AMD, but only recently has anyone looked at total antioxidant status or total circulating blood levels of various antioxidants. Japanese researchers recently measured levels of various antioxidants in people that did and did not have AMD.

Blindness is the condition which is generally caused due to the lack of visual perception which is either caused due to physiological or due to certain psychological factors. Sense organ eye and the spinal cord work together in the process of visualization.

According to the World Health Organization, Glaucoma is the third largest cause of blindness worldwide. It is responsible for blindness in 5.2 million people. More than 80 per cent of the blind and suspect cases of Glaucoma live in the developing world. Prevalence studies in developing nations suggest that Glaucoma is responsible for 14 percent to 18 percent of all blindness.

Cataracts effect in excess of 20 million people but most cataracts are treatable with modern surgical techniques and artificial lens implants. The complication rate of cataract surgery is low. While some cataracts may be inoperable due to other health problems such as uncontrolled diabetes or bleeding disorders, most can be successfully removed.

Children touch the blinds, pets run behind them, and the wind blows, all of these things can cause your vanes to overlap. Before operating the controls, check the vanes to make sure there is no overlap and if there is overlap then undue the overlap before working the controls.

These are the leading cause of blindness. There are a variety of diseases that lead to blindness. Popular among these glaucoma, trachoma, cataracts, uveitis and diabetic retinopathy. While in some cases blindness occurs as a result of a parasitic infection in the eye, in others it occurs as a result of malnutrition.

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