斯隆字母低对比度图
斯隆字母低对比度图
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斯隆字母低对比度图
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Sloan Letters Low Contrast Chart


This Adult Low Contrast sensitivity testing chart is identical to the measurement of visual acuity at a high contrast level; i.e., measures the smallest size of the optotypes that the person can recognize. The 2.5% test is the most practical test in clinical use. This distance vision test is available in 1.25%, 2.5%, 5%, 10%, and 25% contrast levels. Each chart includes recording forms and instructions. 9" x 14" (22.9 cm x 35.6 cm).

Testing distance for the low contrast charts is 10ft (3m).

Note: This chart can only be used with one of our illuminated cabinets


规格
600754 1.25% Contrast;600753 2.5% Contrast;600752 5% Contrast;600751 10% Contrast;600750 25% Contrast
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GOOD-LITE(美国)
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