Why does adult myopic degree still can deepen

Adults are also likely to show a deepening of myopia, especially in patients with high myopia above 600 degrees, there may be a tendency to deepen myopia throughout life. Therefore, even adults should pay attention to protecting their eyes, reduce close eye time, strictly control the time watching mobile phones, TV and computers, and do more outdoor exercise, which can effectively prevent and delay the deepening of myopia. The reason for the deepening of myopia in adults is that excessive eye use causes ciliary muscle spasm, which also induces an increase in axial length, resulting in the formation of myopia and an increase in myopia. For every millimeter increase in axial length, myopia will increase by 300 degrees.