1,Cylindrical lens degrees:measurement range: -9.99 - +9.99D Unit:0.01/0.12/0.25D steps 2,measurement range: 0 - +9.99D JD-2600automatic computer dioptric power meter Introduction of function: 1.Intelligent, graphical user interface;2.The operation is simple, measurement precision, fast;3.Easy to measure single coke, coke, progressive, soft, hard contact lens and all kinds of material of the lens ...