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 from Maryland researchers published at Archives of Ophthalmology says people with impaired visions take 26% less steps in total per day than whose who are with normal visions, and their activity levels are half of the latter, which put them at a higher risk of developing chronic diseases.
