What is to be observed for patients after refractive surgery (PRK, LASIK, …)?
In the calculation for the future IOL, enter at least the measured axial length and the corneal curvatures (refractive power of cornea). The changed corneal geometry does not affect the axial length measurement, but does affect the keratometer values. The formulas presently used for IOL calculation are based on the “Gullstrand Eye,” and thus presuppose defined conditions of the radii of curvature of the cornea’s anterior and posterior surfaces. This “geometry,” however, has been changed by refractive surgery. For this reason, the data obtained with the keratometer cannot be included without adjustment in the IOL calculation (exception: Haigis-L formula).
