Night blindness is a disease manifested by visual impairment in low light or in total darkness. Night blindness is the correct name for hemeralopia, also called twilight vision. The disease occurs when there is a violation of the ability of the visual mechanism to adapt to the lighting conditions of the space.
Causes of hemeralopia (night blindness)
The night blindness is divided into three forms, depending on the cause of its development: congenital, symptomatic and necessary hemeralopia.
The most common form is called the primary form of night blindness, which primarily arises from a vitamin A deficiency. Vitamin A deficiency may be attributed to malnutrition. Severe degradation of the body as a whole, anemia, liver disease, vitamin A drug treatment antagonists, the use of large quantities of fats that inhibit the impact of vitamin also cause disease growth. A history of rubella, toxic effects on the body, alcoholism can also be causes of this form's night-blindness.
Symptoms of night blindness
The first symptom that can cause distress for the patient is the presence in the dark of visible symptoms of diminished vision and discomfort from bright light. The presence of spots in the eyes when switching from darkness to brightly lit spaces can be another symptom of night blindness. His presence also scares patients, and makes him ask an ophthalmologist to take advice.
A decrease in the ability to distinguish colors correctly is possible with night blindness, this is especially evident when identifying the blue color and its various shades.
Diagnosis of night blindness
Diagnosis of the disease is based on the characteristic complaints of patients and data from an objective instrumental study. Electroretinography has been shown to verify the presence of pathology in the structure of the retina of the eye.
Treatment for night blindness
Congenital form of night blindness is poorly treated with vitamin therapy and essential diets. The use of this type of treatment can slightly improve the patient’s vision, but the phenomena of night blindness will not go away, i.e. the patient will still feel uncomfortable in the dark or from bright light. The prognosis of the development of the disease is unfavorable.
Essentially night blindness is treated using a balanced, high-calorie diet.
Filling the vitamin A deficiency in the body involves consuming eggs, butter, milk, cheese. A great quantity of this vitamin is present in cod liver. It is best to consume fruit and berries, such as black currants, blueberries, cherries, peaches, blackberries, rich in vitamin A, all year long. There are actually several drugs containing extracts from these ingredients (the so-called dietary supplements), which you can use in the winter.
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