Abstract
To compare the refractive outcomes and biometric predictability after cataract surgery (PHACO) with those of PHACO combined with GATT and Kahook Dual Blade (KDB) goniotomy. This is a comparative, retrospective, multicenter study. One or both eyes of patients who had undergone PHACO (control group; CG) and those who had undergone combined PHACO and GATT (GI) or KDB (GII) that had been followed for at least 2 months were analyzed. The refraction observed on postoperative day 60 ± 15 was compared with the refraction predicted by the Barrett II Suite using VERION (Alcon, Fort Worth, TX, USA). Possible confounding factors were analyzed using multivariate regression analysis. A total of 292 eyes (CG = 92, GI = 135, and GII = 65) were included. No statistically significant differences were observed among the groups in terms of the means of the absolute variations (expected refraction-manifest refraction) in the sphere (CG = 0.03 ± 0.52 D, GI = -0.01 ± 0.78 D, and GII = -0.21 ± 1.30 D; p = 0.841), cylinder (CG = -0.15 ± 0.49 D, GI = -0.08 ± 1.02 D, and GII = -0.13 ± 0.82 D; p = 0.132), and axis of astigmatism (CG = 7.74 ± 43.31°, GI = 7.98 ± 48.21°, and GII = 14.80 ± 44.08°; p = 0.508). Corneal curvature was the only predictor that achieved statistical significance (p < 0.001); however, only a weak correlation was observed when the final sphere result (r(2) = 0.11) and astigmatism (r(2) = 0.23) were analyzed. The refraction estimated by VERION exhibited high biometric predictability for PHACO and PHACO combined with GATT or KDB. Furthermore, the final refraction was similar for all procedures.