JH-41 5M Normal Children logarithmic visual chart light box
Description
| Specification: | |||||||
| Type of chart: | Graphical | ||||||
| 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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