12539History of the Snellen ChartWhile the Snellen chart establishes a standard, more efficient methods of vision testing have since been developed.While the Snellen chart establishes a standard, more efficient methods of vision testing have since been developed.00:2222http://s3.amazonaws.com/eiivideo/public/assets/image/12299/c1_v1.jpghttp://s3.amazonaws.com/eiivideo/public/assets/flash/11927/c1_v1.flv
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