Visual Outcomes, Patient Satisfaction and Spectacle Independence with a Trifocal Diffractive Intraocular Lens

Trifocal diffractive intraocular lenses (IOLs) distribute light to distant, intermediate, and near foci without a clinically significant deterioration in visual quality [1,2]. Consequently, trifocal IOLs provide significantly better intermediate vision compared to conventional bifocal diffractive IOLs [3]. One of the currently available trifocal IOLs is the AT LISA tri 839MP IOL from Carl Zeiss Meditec (Jena, Germany), which combines a central 4.3-mm trifocal area with a bifocal diffractive surface between 4.3 and 6 mm in diameter [4]. Previous studies have demonstrated that this IOL is able to provide good visual contrast sensitivity and optical quality outcomes [3,4,5,6]. Likewise, Law et al. [6] evaluated a sample of 60 eyes of 30 patients implanted with the AT LISA tri 839MP IOL to determine the level of patient satisfaction with regard to surgical out-come and the impact of the surgery on daily vision-related activities. These authors found that 76.7% of patients were entirely satisfied with the visual outcome and had no difficulties in watching TV or driving 6 months after surgery [6]. Moderate difficulties were reported by a limited percentage of patients in this same study for performing some near and intermediate vision tasks, such as reading the newspaper or working on the computer [6]. Multifocal IOLs have been demonstrated to have an impact on patient quality of life, and this impact has been shown to depend on visual outcome [7,8]. The current study aimed to investigate the correlations between visual outcome obtained with the trifocal diffractive IOL AT LISA tri 839MP and patient satisfaction, spectacle independence, and ease in performing vision-related tasks.