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单词 snellen test
释义 snel·len test
\ˈsnelə̇n-\ noun
Usage: usually capitalized S
Etymology: after Herman Snellen died 1908 Dutch ophthalmologist
: a test for visual acuity presenting letters of graduated sizes to determine the smallest size that can be read at a standard distance
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更新时间:2024/11/13 22:13:45