[Factors Affecting Uncorrected Visual Acuity following Implantation of Apodized Diffractive Intraocular Lenses].

PURPOSE: To investigate the preoperative factors affecting postoperative uncorrected visual acuity (UCVA) equal to or more than 20/20.

SUBJECTS AND METHODS: One hundred sixty seven eyes receiving apodized diffractive multifocal intraocular lenses (SN6AD1) were included in this study. In the eyes with corneal astigmatism of less than 1.0 D, a 2.4 mm clear temporal corneal incision was created. In those equal to or more than 1.0 D, 4.1 mm steepest meridian clear corneal incisions and/or limbal relaxing incisions were conducted. Preoperative factors affecting postoperative UCVA equal to or more than 20/20 were assessed by univariate analysis and multiple logistic regression analysis.

RESULTS: Patient's age and preoperative corneal astigmatism were significant in both univariate analysis and multiple logistic regression analysis. The ratio of postoperative UCVA equal to or more than 20/20 was significantly lower in the patients 70 years or older and in the eyes with corneal astigmatism equal to or more than 1.5 D.

CONCLUSION: Multifocal toric intraocular lenses provide better surgical results in eyes with corneal astigmatism, however patient's age needs to be considered as a factor affecting UCVA.