Hyperopia in infants is usually diagnosed because it frequently causes accommodative esotropia or amblyopia. In contrast, myopia in infants is diagnosed infrequently as it seldom causes these problems. If the degree of myopia in infants increases, the myopia does not disappear. Therefore once myopia is discovered it should be followed carefully. We studied 33 myopic children under 6 years of age. The degree of myopia was low in 13 cases, moderate in 10 cases, and high in 10 cases. Among these subjects, 8 low, 7 moderate, and 3 high myopes had a family history of myopia; infants with such a family history more often had low or moderate myopia than high myopia. Other eye abnormalities or systemic disorders were complications about half of the cases. Thus it seems that the progression of myopia is as important in infants and young children as it is in schoolchildren. Myopia in infants should be diagnosed as hyperopia because it is progressive and occasionally complicated by another abnormality.