These include reversible night blindness and then non-reversible corneal damage known as xerophthalmia. (medlineplus.gov)
The so - called «big four» are: protein - energy malnutrition (PEM), with 500 million people affected and 10 million dying every year; vitamin A deficiency, causing xerophthalmia and blindness, which affect 6 million people a year and kill 750,000; endemic goiter, caused by iodine deficiency and affecting 150 million people a year; and nutritional anemia, affecting 350 million people a year. (religion-online.org)
Good nutrition also prevents child from diseases like anemia and xerophthalmia which are very common during childhood. (newkidscenter.com)