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 CE Certificated, FDA registeredOriginal CCQ-500 from YEASN
 Description: --External Reading--±25D measurement
 --wide field of vision observation
 
  Specification: 
 
| Range of diopter measurement:          | 0~±25D |  
| Minimum scale value:                   | 0.125Dat 0~±5D 0.25Dat ±5D~25D |  
| Cylindrical lens axis of astigmatism:  | 0~180゜,Minimum scale value:1゜ |  
| Prism diopter:  |  
| Pattern A:0~5Δ, Minimum scale value:  | 1Δ |  
| Pattern B:0~20Δ,minimum scale value:  | 1Δ |  
| Prism basal angle:                     | 0~180゜,minimum scale value 1゜ |  
| Adjustable range of eyepiece:          | ±5D |  
| Measured size of lens:                |  φ16~φ80mm |  
| Dimensions:                             | 250(L)x150(W)x450(H) |  
| Weight:                                 | 4.9kgs |  
| Illuminating lamp:                      | 6V/2A 12W |  
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