Citation

Benedi-Garcia, C., Vinas, M., Lago, C. M., Aissati S., De Castro, A., Dorronsoro, C, and Marcos, S.; Optical and visual quality of real intraocular lenses physically projected on the patient’s eye. Biomed. Opt. Express 12, 6360-6374 (2021). For more information, click here.

 

Abstract

Visual simulators aim at evaluating vision with ophthalmic corrections prior to prescription or implantation of intraocular lenses (IOLs) in the patient’s eye. In the present study, we present the design, implementation, and validation of a new IOL-in-cuvette channel in an Adaptive Optics visual simulator, which provides an alternative channel for pre-operative simulation of vision with IOLs. The IOL is projected on the pupil’s plane of the subject by using a Rassow system. A second lens, the Rassow lens, compensates for an IOL of 20 D while other powers can be corrected with a Badal system within a 5 D range. The new channel was evaluated by through-focus (TF) optical quality in an artificial eye on bench, and by TF visual acuity in patients, with various IOL designs (monofocal, diffractive trifocal, and refractive extended depth of focus).

©2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Citation

Sawides, L., de Castro, A., Lago, C. M., Barcala, X., Zaytouny, A., Marcos, S., & Dorronsoro, C.; SimVis simulations of multifocal IOL designs based on public-literature data. Optical Design and Engineering VIII (Vol. 11871, pp. 122-132). SPIE. (2021 Sept.). For more information, click here.

 

Abstract

As a large variety of intraocular lens (IOL) designs is commercially available in a growing market, selecting the best IOL for each patient has become a crucial task for a positive surgical outcome. Information about the measured or estimated performance of commercial lenses, as the through-focus modulation transfer function (TF-MTF) at a given frequency and pupil diameter, is routinely published. SimVis Gekko, a see-through simultaneous vision simulator based on temporal multiplexing, allows patients to experience the real world through different multifocal corrections prior to surgery. Implementing the maximum number of commercially available IOL designs into the portfolio of SimVis Gekko simulations is needed to provide a complete experience for the patients. We developed a new method to visually simulate IOL designs using temporal multiplexing, based only on publicly available information (mainly scientific literature or regulatory information), using the TF-MTF at 15cpd as input data to estimate the temporal coefficients that provide the best approximation to the real lens design. We validated the method with synthetic phase maps of equal area segmented bifocal and trifocal multifocal corrections for three pupil diameters of 3mm, 3.75mm and 4.5mm and applied it to three commercially available IOLs (trifocal or extended-depth-of-focus lenses). Through-focus visual acuity (TF-VA) curves were measured in seven patients using the SimVis simulations in the SimVis Gekko and matched, on average, the through-focus VA measurements in patients with implanted IOLs, reported in the scientific literature (on average logMAR RMS error=0.05, corresponding to less than 3 letters of visual acuity charts).

 

Keywords

Simultaneous vision; Temporal multiplexing; Visual simulations; MTF; Visual Strehl; Multifocal IOL designs; Through-focus optical quality