n=1.523 photochromic PBX/PGX mineral optical lens

(1)single vision PGX/PBX finished optical lens

dia:60/65mm   base:4 base:6

power range:  spere: 0.00~+/- 6.00

                     cylinder:  0.00~ -6.00/-0.25~-2.00

                                +0.25~+6.00/-0.25~+6.00

(2) semi-finished flat top/round sharp  bifocal PGX/PBX optical lens

dia:60/65mm   seg: 28mm 

powr range: added  +0.25 to +3.00

(3)finished fla top bifocal /round sharp bifocal PGX/PBX optical lens

dia:60/65mm   base:4 base:6

power range:  spere: 0.00~+/- 6.00

                     cylinder:  0.00~ -6.00/-0.25~-2.00

                                +0.25~+6.00/-0.25~+6.00

                     added power: +0.25~ +3.00