企业信息
第11年
- 入驻时间： 2009-07-24
- 联系人：张经理
- 电话：18910282540
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联系时，请说明易展网看到的
- Email：3007497206@qq.com
产品详情
简单介绍：
图形对比敏感度卡 wi127215 图形对比敏感度卡 wi127215
详情介绍：
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| 详 细 说 明 | ||
LEA SYMBOLS® Low Contrast Test, 10M
Test for quick measurement of low contrast visual acuity at 25%, 10%, 5%, 2.5%, and 1.25% contrast by measuring the distance where the symbols are seen. 10M symbols correspond to visual acuity 0.10 at 1 m, 0.05 at 0.5 m and 0.3 at 3 m. VA values are thus easy to calculate. Test includes a table for conversion to Snellen equivalent VA values, a response key, training cards, recording forms and instructions. 6 pages, 3.25" x 9" (8.25 cm x 22.9 cm). |
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