Measurement
Product Details
C:The (BVD)back vertex distance is the distance between the back of a correcting lens and the comea
B:For best results,specially for progressive addition lenses it is BVD:Recommended as minimum as possible
A:First try to select appropriate Frame that suits face and Rx then and adjust it on the patient's face before taking the measurement.Measure the PA as shown;you will get the pantoscopic angle(PA) with the needle. Adjust the Frame if required to achieve recommendation for comfort.
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Measurement
Measurement
- Place of Origin:Zhejiang, China
- Place of Origin:Zhejiang China (Mainland)
- Country:China (Mainland)
- telephone:86-576-85669078
| Delivery Time: | 15-25days |
| Supply Ability: | 500 Piece/Pieces per Month |
| Payment Terms: | L/C,T/T |
| Place of Origin: | Zhejiang, China |
| Place of Origin: | Zhejiang China (Mainland) |
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