Inducing cylindrical and spherical defocus after implantation with new generation intraocular lenses improves intermediate and near visual acuity.

An induced cylinder and spherical power after implantation with an extended depth of focus (EDOF) and enhanced monofocal intraocular lens (IOL) could improve distance, intermediate (60 cm) and near (40 cm) visual acuity (VA). In this prospective study, forty eyes with Eyhance EDOF IOL (Johnson and Johnson, USA) and 40 eyes with Vivity EDOF IOL (Alcon Laboratories Inc. USA) were included.

Inverted meniscus IOLs reduce image shifts in the periphery compared to biconvex IOLs.

Intraocular lenses (IOLs) are routinely used to replace cataractous crystalline lenses. Most current models have a biconvex design that reduces optical quality in the periphery since they are optimized only for central vision. Inverted meniscus IOLs are optimized to achieve similar optical performance to phakic eyes in the peripheral retina.

Visually relevant on-bench through-focus analysis of intraocular lenses.

Cataract surgery involves the implantation of an intraocular lens (IOL) to replace the opacified crystalline lens. Monofocal IOLs, the most common type, are intended to have the eye in focus at a given distance, usually at infinity. Simultaneous vision IOLs (SVIOLs) and extended depth of focus (EDOF) aim to minimize postoperative dependence on spectacles by providing either multiple foci or an extended depth of focus.

Ultra-wide-angle peripheral refraction using a laser-scanning instrument.

We compared the peripheral refractive measurements of a recently proposed laser-scanning instrument with an established peripheral refractor. Two-dimensional refractive maps were obtained using both instruments for 18 young subjects with differing values of central refraction. The comparison shows a strong correlation between devices in the overlapping measurement area, with the new device extending the range of the explored retinal area to a 100-degree-diameter circular patch, compared to the 60°x35° rectangular area of the older peripheral refractor.