ETDRS远用视力表-C（500037）
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Landolt C ETDRS Translucent Distance Chart
ETDRS Landolt C vision chart with proportionally spaced (logMAR) translucent chart for ESV3000. Line sizes range from 20/200 to 20/10 (6/60 to 6/3) equivalent, 0.10 to 2.00
Landolt C openings are found at the up, down, left & right position only.
13 feet/ 4 meter testing distance
规格
500037
品牌
GOOD-LITE(美国）
