Menicon S9

Power is the strenght of your contact lens, and is a number between -25 and +25 (e.g. -1.50 or -1,75 or +1.00 or +2.50, etc.)

Power is also called ”Pwr”, ”D”(diopters), ”Strenght” or ”SPH” (sphere) in the prescription or on the contact lens box.

In your prescription, ”OS” = Your left eye and ”OD” = Your right eye.

OU = Both eyes (your eyes have exactly the same parameter)

--> If you are nearsighted (can see only near objects well) then select MINUS powers.

--> If you are farsighted (can see only distant objects well) then select PLUS powers.

Note, the power of the contact lenses is generally not the same power as in your eyeglass prescription.