power 4dPick your 4D Powerball numbers 3 ways to increase your chances to win: add more 4D numbers, Powerballs, or both to form more combinations. Just add RM2 for every possible Powerball combination you get from your Combo Play. OROptical power is also referred to as dioptric power, convergence power, refractive power, or refractive power. It is equal to P = 1 f. Dioptre Formula . The Dioptre formula is used to