Vitamin A Deficiency Causes Night Blindness

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Of these 105 cases along with controls matched for age sex and neighbourhood had their scotopic vision examined under standard condition using a luxometer underwent an ophthalmological examination and had their serum vitamin a level determined.

Vitamin a deficiency causes night blindness. Vitamin a deficiency also harms the immune system the body s ability to fight disease. And as per studies vitamin a deficiency is the leading cause of preventable blindness in children globally. Vitamin a deficiency vad or hypovitaminosis a is a lack of vitamin a in blood and tissues.

In pregnant women vitamin a deficiency causes night blindness and may contribute to maternal mortality 9. Nyctalopia night blindness is one of the first signs of vad. It may be helpful to take precautions to lower some of the risks that night blindness can cause.

It also affects the immune system and results in deaths from malaria diarrhoea and measles. In pregnant women vitamin a deficiency causes night blindness and may contribute to maternal mortality. An estimated 250 000 to 500 000 children become blind every year because of vitamin a deficiency.

Corrective lenses such as eyeglasses or contacts can improve nearsighted vision both during the day. It is common in poorer countries especially among children and women of reproductive age but is rarely seen in more developed countries. This increases the chance of death from malaria measles and diarrhea.

Night blindness caused by nearsightedness cataracts or vitamin a deficiency is treatable. Severe vitamin a deficiency can lead to night blindness several observational studies have reported a high prevalence of night blindness in developing nations 12 13 14 15 due to the extent. Vitamin a deficiency is the major cause of severe diseases infections and preventable blindness in children.

In a cross sectional survey of 5420 children in northern bangladesh 124 were reported to have night blindness by their parents.

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