Discussion
dysphotopsia
IOL
In this study, we compared the clinical outcomes after bilateral implantation of an enhanced monofocal IOL and a standard monofocal IOL to investigate the efficacy of the novel optical design for intermediate distance. At 3-months postoperatively, patients with bilateral Tecnis Eyhance IOL demonstrated statistically significantly better monocular and binocular UIVA and UNVA in addition to superior monocular UDVA and CDVA compared to patients with bilateral standard monofocal IOLs. Most importantly, the incidence of dysphotopsia perceived by patients with bilateral Eyhance IOLs was comparable to that of patients with bilateral standard monofocal lenses, demonstrating the efficacy of the Eyhance IOL in providing good vision at all distances while minimizing the optical side effects.Our findings are in alignment with those of previous reports which demonstrated superiority of the Eyhance IOL in UDVA and UIVA [Both the monocular and binocular defocus curves measured in Group 1 demonstrated a wider and smoother slope than those of Group 2. While the defocus curves from previous studies [Reading speed is a better indicator of the patients’ actual visual function in daily life and thus has been widely used in numerous clinical studies to characterize the functional outcomes [As reported by previous studies [We also evaluated the patients’ subjective satisfaction in their daily life using QoV, QoL, and NEI VFQ-25 questionnaires. Both groups showed improvement postoperatively in all questionnaires and showed excellent outcomes in terms of photic phenomena, with more than 90% of patients indicating to experience ‘none’ of photic phenomena in any situation. As the Tecnis Eyhance features an additional optic design in its central optic to generate intermediate vision, one may expect a higher rate of positive dysphotospia. Our results, however, could not substantiate this hypothesis as we observed a comparable rate of photic phenomena in both groups. Given that more than 90% of patients in Group 1 indicated to be spectacle independent for performing tasks in far and intermediate distances, our results suggest that the Tecnis Eyhance IOL is able to provide satisfactory far and intermediate vision, while causing minimal optical side effects.Although this study may be limited by its relatively short follow-up period and a small sample size, this is the first prospective, randomized controlled study aimed at characterizing the patients’ daily visual performance after bilateral implantation of the Tecnis Eyhance IOL by assessing various visual parameters including reading performance.