Q: Some knowledge of bifocals.
A: Here is some knowledge of bifocals. When measuring for seg heights, always remember that you simply lose about or at least 1mm as a result of eye wire, with the exception of rimless, or semi rimless frames. This can be more important, and in all likelihood is to use your progressive wear lenses.
With a line bifocal, when you measure 20 high, it will be easy to utilize at the least 19mm. Which has a progressive when there is 10mm of actual full power segment, maybe you have only 9mm, as well as in short corridor progressives, situation may be worse.
Thus this is the reason i love to fit progressives with a B measurement of believe it or not then 27mm. thus i came up with a trifle rhyme.
27 could be heaven
28 may well be great
29 is mighty fine
- Model No: EH83222
- Highlight: Latest Fashion Style
- Gender: Woman’s Eyewear
- Age Group: Adults
- Frame Size: 51-17-135
- Shape: Rectangle Eyewear
- Spring Hinge: No
- Color: Black Outside And White Inside
- Available Color: Brown Outside And White Inside
- Material: Acetate
- Tips: No
- Bridge: Unadjustable nose pads
- Original: ShenZhen
- Rim: Full-Rim Spectacle
- Certificate: CE and FDA are certificated
- Warranty:1-Year Warranty.
- Availability: In Stock for Eyewear Distributor
- Payment Terms: Paypal, Western Union
- Minimum Order:12pcs/Model, 300pcs in total
- Market Preference: Australia & New Zealand Eyewear, Africa Spectacle Frame
- Eyewear Quote
- Package: 1pcs/Poly-bag, 12pcs/Inner Box, 300PCS/Carton
- Carton Box Size: 84*27*31
- Cross Weight: 12KGS
- HS Code: 90031900
- Delivery Time: Within 7 days upon received your payment