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用Snellen 视力表所测视力是一个比较粗糙的视功能指标,它所测得的分辨力仅仅是高对比度的目标,但在生活中物体是有不同对比度及不同空间频率的。近年来用对比敏感度作临床检查已广泛引起人们的兴趣。目前已有一些检查对比敏感度的设备问
Snellen vision chart measured vision is a relatively rough visual function, it measures the resolution is only the goal of high contrast, but in life objects have different contrast and different spatial frequencies. In recent years, the use of contrast sensitivity for clinical examination has aroused widespread interest. There are some devices to check for contrast sensitivity