马里兰州研究人员在《眼科学档案》（Archives of Ophthalmology）发表的一份报告说，视力受损者每日步行总数比正常视力者少26%，并且身体活跃度约为后者的一半，这可能会增加视力受损者患慢性病的风险。
A report published in the Archives of Ophthamology by researchers in Maryland says that the number of steps walked by a visibility damaged person is 26% less than that of a person with normal vision, and the amount of physical activity of is about half of the latter, which could increase the risk of the visibility damaged developing chronical illnesses.
