about customfreeform multifocal lenses. often have 4 function.
A normal , it is base one. Has anti reflection and anti radiation functions.
B, blue light. ( inculd A function)
C. photochromic. ( inculd A function)
D blue light with photo grey together. ( includ A,B.C function together)
Index : 1.56.1.61.1.67.or 1.74 all have. you can see the price big different. please choice right one base your budget.
A normal , it is base one. Has anti reflection and anti radiation functions.
B, blue light. ( inculd A function)
C. photochromic. ( inculd A function)
D blue light with photo grey together. ( includ A,B.C function together)
Index : 1.56.1.61.1.67.or 1.74 all have. you can see the price big different. please choice right one base your budget.