day-blindness

Night blindness (syn .: night blindness , night blindness) - a sharp deterioration of vision in low light conditions, dusk and night. At the heart of night blindness development mechanisms are violations of formation and decay of rod-shaped cells in the retina of the visual pigment rhodopsin, which plays a major role in the adaptation of the dark to.

There are congenital, symptomatic and essential day-blindness. Day-blindness Congenital manifests in childhood and early adolescence, often wears family hereditary. Symptomatic day-blindness is a symptom of organic diseases of the eye (retinal pigment degeneration, glaucoma, high myopia or complicated). Essential day-blindness develops as a result of malnutrition, especially with a lack of vitamin A in the diet, chronic diseases of the liver.

Treatment is directed at the underlying disease. At the same time, regardless of the cause of night blindness recommended eating foods rich in vitamin A (cod liver oil, butter, milk, cheese, egg yolk), vegetable products, which contain pro-vitamin A, - carrots, spinach, lettuce, tomatoes, green peas, as well as blackberries, blueberries, black currants, gooseberries, cherries, peaches, apricots, mountain ash.

The prognosis for cure congenital night blindness unfavorable, with symptomatic depends on the nature and severity of the underlying disease; in essential auspicious night blindness. Prevention includes good nutrition, prevention and timely treatment of eye diseases.