Description：

Specification：

5 sets of lenses:
0.00D,-0.25D,-0.50D,-0.75D,-1.00D,-1.25D,-1.50D,-1.75D,-2.00D,-2.50D,-3.00D
-3.50D,-4.00D,-5.00D,-6.00D,-7.00D,-8.00D,-10.00D,-12.00D,-14.00D,-16.00D,-18.00D
+0.25D,+0.50D,+0.75D,+1.00D,+1.25D,+1.50D,+1.75D,+2.00D,+2.25D,+2.50D,+2.75D,
+3.0D,+3.25D,+3.50D,+3.75D,+4.00D,+4.50D,+5.00D,+5.50D,+6.00D,+6.50D,+7.00D,
+8.00D,+9.00D,+10.00D,+11.00D,+12.00D,+13.00D,+14.00D,+16.00D,+18.00D,+20.00D,+22.00D