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Difficulty seeing in low light or darkness, most often caused by a deficiency of Vitamin A.
Government Vitamin A supplement programmes for young children in India are aimed largely at preventing this condition.
A nutrient the body needs in small amounts to work properly. Vitamins do not give energy directly but are needed for growth and health.
A condition caused by not getting the right amount of nutrients — this can mean too little food (undernutrition) or too much of the wrong food.
