There are usually three possibilities for eye prescription 0.5, mainly 50 degrees of myopia, 50 degrees of hyperopia and 50 degrees of astigmatism, all three of which are relatively low in normal eyes, so prescription 0.5 is relatively normal, and the majority of cases do not affect vision or have much impact on visual function. In children with 50 degrees of myopia, it is also necessary to pay attention to. Once myopia has developed, it is likely to continue to increase and will need to be followed up every six months. If there is a loss of vision or a rapid increase in myopia, glasses will be needed to correct it. In adults, these three diopters are relatively stable, most of them do not affect the vision and do not change too much, if the vision can meet the daily needs can not wear glasses, if you feel some difficulty to see at night, you can consider wearing a pair of glasses, when necessary.