Prediction of postoperative refractive astigmatism before toric intraocular lens implantation

Abstract Background To determine the preoperative factors influencing refractive astigmatism after cataract surgery for correction by toric intraocular lens (IOL) implantation and to evaluate prediction model using these factors. Methods Prospective, observational case series. The right eyes of forty consecutive patients with corneal total cornea 1.5 diopters (D) or more in magnitude scheduled a non-toric IOL during 2.4-mm temporal clear incision were examined prospectively. vertical/horizontal component (J0) oblique (J45) converted power vector analysis. Multivariate regression analysis was performed at three months postoperatively as dependent variable, parameters including age, sex, astigmatism, sphere, spherical equivalent, pressure, thickness, anterior chamber depth, positions (tilt decentration), axial length, higher order aberrations independent variables. root mean square (RMS) errors calculated express fit. Results J0 $$ Postoperative\kern0.34em refractive\kern0.2em J0=1.05\times Coneal\kern0.2em J0-0.14 P o s t p e r a i v f c J 0 = 1.05 × C n l − 0.14 ( R 2 = 0.96, P < 0.001). J45 J45=0.68\times J45+0.19\times Preoperative\kern0.34em J45-0.06 45 0.68 + 0.19 0.06 0.72, RMS alone multivariate 0.58 D 0.46 D, respectively. There statistically significant difference between them 0.02). Conclusions Refractive can be predicted accurately than alone. However, remains challenge.