Deficiency Diseases
Diseases that are caused by the lack of some particular nutrient in a person's diet are called deficiency diseases. Nutritional diseases are diseases in humans that are directly or indirectly caused by a lack of essential nutrients in the diet. Nutritional diseases are commonly associated with chronic malnutrition. Additionally, conditions such as obesity from overeating can also cause, or contribute to, serious health problems. Excessive intake of some nutrients can also cause acute poisoning
1. Night-blindness:
A child having this disease is unable to see properly in the dark. His eyes become dull and listless and the skin becomes dry. If not treated in time, the child may become blind.
There are plenty of symptoms that can be associated with night blindness, but the condition is usually characterized by having difficulties seeing at night, in poor light and in darkness during daytime. Other common symptoms of night blindness also include blurred vision and dry eyes. Another symptom is the significant reduction of the contrast vision which can be noted most easily by being unable to see pedestrians in poorly lit streets. Persons who suffer from night blindness cannot read or watch television for extended periods of time because their eyes get tired easily. These persons also have problems getting adjusted when coming from brightly lit areas towards dimly lit areas. People who suffer from night blindness usually have troubles driving at night and they often require extra light when reading. As a result of impaired vision a person may stumble on the pavement or the stairs. Sometimes laser vision surgeries may result in night blindness as a side effect of the procedure.
Cause:
This disease is caused due to the deficiency of vitamin A in the diet. Cure
Increase of vitamin A ingestion by eating certain types of food and the intake of supplements are usually a part of the treatment. One should stop taking any glaucoma medications and visit an ophthalmologist
1. Night-blindness:
A child having this disease is unable to see properly in the dark. His eyes become dull and listless and the skin becomes dry. If not treated in time, the child may become blind.
There are plenty of symptoms that can be associated with night blindness, but the condition is usually characterized by having difficulties seeing at night, in poor light and in darkness during daytime. Other common symptoms of night blindness also include blurred vision and dry eyes. Another symptom is the significant reduction of the contrast vision which can be noted most easily by being unable to see pedestrians in poorly lit streets. Persons who suffer from night blindness cannot read or watch television for extended periods of time because their eyes get tired easily. These persons also have problems getting adjusted when coming from brightly lit areas towards dimly lit areas. People who suffer from night blindness usually have troubles driving at night and they often require extra light when reading. As a result of impaired vision a person may stumble on the pavement or the stairs. Sometimes laser vision surgeries may result in night blindness as a side effect of the procedure.
Cause:
This disease is caused due to the deficiency of vitamin A in the diet. Cure
Increase of vitamin A ingestion by eating certain types of food and the intake of supplements are usually a part of the treatment. One should stop taking any glaucoma medications and visit an ophthalmologist