Results of a clinical evaluation of a trifocal intraocular lens in Japan

Purpose To evaluate the effectiveness and safety of a new trifocal intraocular lens (IOL) after cataract removal in patients living in Japan. Study design Prospective multicenter clinical study. Methods One hundred and thirty-five eyes of 68 patients (19 men, 49 women; mean age, 66.3 +/- 7.4 years) were followed for 6 months. Trifocal IOLs with focal points at near, intermediate, and distance were implanted bilaterally in eyes with less than 1 diopter of corneal astigmatism. The visual acuity (VA) at distance, 60 and 40 centimeters (cm), and contrast sensitivities were measured. Patients completed quality-of-life questionnaires preoperatively and postoperatively. Results The mean bilateral logarithm of the minimum angle of resolution VA at 5 meters (m), 60 cm, and 40 cm were, respectively: uncorrected, - 0.104 +/- 0.095, - 0.065 +/- 0.111, and - 0.042 +/- 0.105; and distance-corrected, - 0.197 +/- 0.076, - 0.112 +/- 0.111, and - 0.073 +/- 0.111. The contrast sensitivities at distance and near were within the normal range at all spatial frequencies under photopic conditions. Patients reported complete spectacle independence in 75.0% of cases. Total use of spectacles was reported by 1.5% and partial by 20.6%; the purpose of spectacle use was primarily for near visual tasks. Mild-to-moderate glare was reported by 65.7% of patients and halos by 70.1%; only 1.5% of subjects reported severe glare and halos. Conclusions This new trifocal IOL provides equally good uncorrected VAs at distance, intermediate, and near, and decreases spectacle dependence in daily life. Patients frequently report mild-to-moderate glare and halos, and patients should be informed about these before implantation.