Pinero D, et al. - Experts intended to investigate a new method of calculation of total corneal astigmatism based on Gaussian optics and the power design of a spherocylindrical lens (C) in the healthy eye and to compare it with keratometric (K) and power vector (PV) methods. Corneal astigmatism was calculated in all cases using K, PV, and the new approach C that regarded the contribution of corneal thickness. Findings demonstrated statistically prominent variations between methods in the magnitude of astigmatism, with the highest values provided by K. The use of this new approach for the calculation of total corneal astigmatism presented with astigmatic results. These results were comparable to the PV method, which indicated that the effect of pachymetry on total corneal astigmatism was minimal in healthy eyes.