<prompt> SRK formula used to calculate power of IOL is A IOL constant ,K corneal curvature, L axial length of eyeballA - 2.5k - 0.9 LA - 2.5L - 0.9 k2.5A - L- 0.9KL - 0.9L - 2.5K  <response>: SRK formula to calculate power of IOLPower A IOL constantL axial length of eyeball given by A - scan USGK Corneal curvature by Kertometer. 