Intermediate Visual Acuity Comparison Of Two Non-Diffractive Enhanced Monofocal Intraocular Lenses

In modern cataract surgery a higher spectacle independence is becoming increasingly important. To achieve that, several different optical designs have been introduced. One group of lenses are the enhanced monofocal Intraocular lenses (IOLs) which have comparably the least compromises concerning side effects like positive dysphotopisas or reduced contrast sensitivity but still enhance the intermediate visual acuity compared to standard monofocal IOLs while being relatively cost efficient. Aim of this study is to compare two different enhanced monofocal IOLs, the TECNIS Eyhance from Johnson & Johnson which was one of the first of its kind and the Evolux from SIFI Group which is a more recent one.

Vienna Institute for Research in Ocular Surgery (VIROS), a Karl-Landsteiner-Institute, Hanusch Hospital, Vienna, Austria.

35 patients (70 eyes) with cataracts who were scheduled for bilateral surgery were included in the study. The SIFI Evolux IOL or the TECNIS Eyhance was implanted according to randomisation, and the other IOL into the contralateral eye. The patients underwent several examinations: once before surgery, 1 week as well as 1 month and 3 months after surgery. Examinations included monocular visual acuity in different distances (4m, 66cm and 40cm respectively corrected and uncorrected), contrast sensitivity test using the Optec 6500, halo size using a Halometer and a questionnaire at the last visit.

A preliminary analysis of 44 eyes of 22 patients 1 month after surgery showed no significant difference in spherical equivalent (mean: 0.08 vs. -0.09 D, p 0.086) between the Evolux and the Eyhance, respectively. UCDVA (mean: 0.0 logMAR both), CDVA (-0.1 vs. 0.0 logMAR), UCIVA (0.2 logMAR both), DCIVA (0.2 logMAR both), UCNVA (0.4 vs. 0.3 logMAR), and DCNVA (0.3 logMAR both) were also comparable between the two IOLs (all p > 0.150). No significant differences were found in mesopic and photopic contrast vision without and with glare at different spatial frequencies (all p > 0.05) between the two IOLs. Additionally, no difference could be detected in halo size (mean: 1.07 vs. 1.03 deg², p 0.520) between the Evolux and the Eyhance.

The preliminary results of about two-thirds of the patients 1 month after surgery show no inferiority of the SIFI Evolux compared to the TECNIS Eyhance regarding all tests. The final results will be presented at the ESCRS.