power 4dUp the stakes with 4D Jackpot, an extension of the orinal 4D game with a multi million ringgit prize! 1. Pick two 4-dit numbers from 0000 to 9999, e.g. (1188, 2288), (3388, 2233), or (1338,Optical 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