Why carry out this study?

A new category of intraocular lenses (IOLs) has been introduced that improves intermediate vision of pseudophakic patients and induces a comparable level of photic phenomena to a standard monofocal implant. Given that those IOLs are of recent introduction, the scientific literature on their performance is scarce.

Quality metrics derived from the optical transfer function offer a high correlation with clinical visual acuity, which can be used to predict the clinical performance of new monofocal IOLs with an extended depth of focus prior to implantation.

What was learned from the study?

Enhanced-monofocal IOLs, based on a higher-order aspheric design, provide a comparable far optical quality and extended intermediate range while producing a monofocal-lens halo type. However, the depth-of-focus extension varies between the models, which should be taken into account in preoperative counseling.

Although the enhanced-monovision approach offered an extended visual range, a − 1D defocus and spherical aberration effects might increase a binocular perception of photic phenomena.