Ophthalmology >>>> The disease Night blindness is hemeralopia
The disease Night blindness is hemeralopia.
Disease Night blindness (or impaired twilight vision) develops as a result of impaired adaptation of the visual apparatus to conditions of twilight, dark time of day or to conditions of artificially created blackout.
At the heart of the disease is hemeralopia is a violation of the synthesis of the pigment rhodopsin, which is responsible for the adaptation of the visual apparatus to darkness and the formation of night vision.
Vitamin A is involved in the synthesis and restoration of rhodopsin, for this reason, disorders in the absorption of vitamin A by the body and its vitamin deficiency can lead to impaired twilight vision.
The reasons for the development of night blindness are due to many factors:
- Previously transferred infectious diseases that have affected the visual apparatus;
- Avitaminosis and hypovitaminosis of vitamin A, vitamin E, PP, B2, provoked by diets, vegetarianism, medical fasting;
- Hereditary pathologies (retinitis pigmentosa, Asher syndrome);
- Eye diseases (optic nerve atrophy, glaucoma, cataract, retinal detachment);
- Eye trauma (burns, photoophthalmia);
- Metabolic disorders;
- Diseases of the liver and gastrointestinal tract associated with impaired absorption of nutrients in the intestines.
Night blindness signs:
- Blurred vision in darkened conditions,
- Narrowing of the field of view,
- Decreased perception of blue and yellow colors.
Treatment for night blindness depends on the underlying causes. Hereditary night blindness is incurable. Twilight vision impairment caused by acquired pathologies involves the treatment of diseases that provoked night blindness. Night blindness caused by vitamin deficiencies and malnutrition requires a revision of food addictions, enrichment of the diet with foods rich in carotene, vitamin therapy with niacin, vitamin A, vitamin E, and B vitamins.
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