Semi-Finished CR-39 and Poly in 3, 5, 7 and 9 base? Anyone offer the odd BCs?

[WFruit]

So, Sola/Zeiss doesn't have a 7.00 or 7.25, but they do have a 7.80 and an 8.00? very Strange.

Essilor has both a 6.25 and 6.50 in the same diameter. Strange again.

Vision-Ease has the most logical and evenly spaced set. Its kind of hodge-podge of BC, diameters.

For Sola/Zeiss, I'm betting that one of them is Sola and the other Zeiss.

For Essilor, the 6.25 is their Airwear brand, and the 6.50 is Gentex.

I've found that for most SFSV lenses, the lower (0.00 to 1.00) base and higher base (9.00 and up) will tend to be available in smaller blanks than the middle range, due to the thought that higher prescriptions should be in smaller frames.

[sharpstick777]

Good info, I guess with all the acquisitions they end up with odd ball numbers they just keep...

For Sola/Zeiss, I'm betting that one of them is Sola and the other Zeiss.

For Essilor, the 6.25 is their Airwear brand, and the 6.50 is Gentex.
I've found that for most SFSV lenses, the lower (0.00 to 1.00) base and higher base (9.00 and up) will tend to be available in smaller blanks than the middle range, due to the thought that higher prescriptions should be in smaller frames.