JH-40 LED 2.5M Children logarithmic visual chart light box, 2.5CM thickness
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JH-39 Normal 5M standard visual chart light box, 10CM thickness
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Item#
JH-39
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Description
| Specification: | |||||||
| Type of chart: | E charts, red/green balance chart | ||||||
| Distance of testing: | 5m | ||||||
| Range of testing: | from 4.0 to 5.3 | ||||||
| Record of vision: | five points record, decimal record, fraction record | ||||||
| Size: | 920 * 280 * 100mm | ||||||
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