Exploring contact lens opportunities for patients above the age of 40 years

Naroo, Shehzad A.; Nagra, Manbir; Retallic, Neil

doi:10.1016/j.clae.2022.101599

Cited by 4 publications

(2 citation statements)

References 19 publications

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“…This tendency was demonstrated in the study of Naroo et al. 4 , in which the percentage of CL users changed from 66 to 52% and 25% among the 40–44, 45–49 and 65–70 years age groups, respectively. Also in this study, only 25% of presbyopic CL users wore a multifocal or multifocal toric design, a very similar proportion (29%) to the one found by Morgan et al.…”

Section: Introductionmentioning

confidence: 79%

Simulation of daily soft multifocal contact lenses using SimVis Gekko: from in-vitro and computational characterization to clinical validation

Esteban-Ibañez,

Montagud-Martínez,

Sawides

et al. 2024

Sci Rep

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Multifocal contact lenses (MCLs) are one of the solutions to correct presbyopia, but their adoption is not widespread. To address this situation, visual simulators can be used to refine the adaptation process. This study aims to obtain accurate simulations for a visual simulator (SimVis Gekko; 2EyesVision) of daily soft MCL designs from four manufacturers. In-vitro characterization of these MCLs—several powers and additions- was obtained using NIMO TR-1504. From the averaged relative power profiles across powers, phase maps were reconstructed and the Through-Focus Visual Strehl metric was calculated for each MCL design. The SimVis Gekko simulation corresponding to each MCL design was obtained computationally and bench-validated. Finally, the MCL simulations were clinically validated involving presbyopic patients. The clinical validation results show a good agreement between the SimVis Gekko simulations and the real MCLs for through-focus visual acuity (TF-VA) curves and VA at three real distances. All MCL designs showed a partial correlation higher than 0.90 and a Root Mean Square Error below 0.07 logMAR between the TF-VA of simulations and Real MCLs across subjects. The validity of the simulation approach using SimVis Gekko and in-vitro measurements was confirmed in this study, opening the possibility to accelerate the adaptation of MCLs.

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Section: Introductionmentioning

confidence: 79%

Simulation of daily soft multifocal contact lenses using SimVis Gekko: from in-vitro and computational characterization to clinical validation

Esteban-Ibañez,

Montagud-Martínez,

Sawides

et al. 2024

Sci Rep

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show abstract

“…Despite the existence of bifocal and multifocal designs in CLs (MCLs), the percentage of CL users decreases when the presbyopia is reached. This tendency was demonstrated in the study of Naroo et al [4], in which the percentage of CL users changed from 66-52% and 25% among the 40-44, 45-49 and 65-70 years age groups, respectively. Also in this study, only 25% of presbyopic CL users wore a multifocal or multifocal toric design, a very similar proportion (29%) to the one found by Morgan et al [5].…”

Section: Introductionmentioning

confidence: 79%

Simulation of daily soft multifocal contact lenses using SimVis Gekko: from in-vitro and computational characterization to clinical validation

Esteban-Ibañez¹,

Montagud-Martínez

Sawides³

et al. 2023

Preprint

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Multifocal contact lenses (MCLs) are one of the solutions to correct presbyopia, but their adoption is not widespread due to factors such as discomfort, lack of awareness, a lengthy fitting process and/or unexpected visual performance. To address this situation, visual simulators can be used to aid in refining the adaptation process. This study aims to obtain accurate simulations for a novel visual simulator (SimVis Gekko; 2EyesVision, Spain) of various daily commercial soft MCL designs from four different manufacturers: Dailies Total1 (Alcon), MyDay (Coopervision), 1Day Acuvue Moist (Johnson & Johnson) and Biotrue ONEday (Bausch + Lomb). In-vitro characterization of these MCLSs -for several distance powers and additions- was obtained using a NIMO TR-1504 instrument (Lambda-X, Belgium). From the averaged relative power profiles across distance powers, phase maps were reconstructed and Through-Focus Visual Strehl (TFVS) metric was calculated for each MCL design considering different optical diameters. The SimVis Gekko simulation corresponding to each MCL design and pupil diameter was obtained computationally and validated on bench. Finally, the MCL simulations were clinically validated in a pilot study involving presbyopic patients with different refractive errors and additions. The results of the clinical validation show a good agreement between the SimVis Gekko simulations and the real MCLs (for all the designs) when measuring through-focus visual acuity (TFVA) curves and VA at three real distances. All MCL designs showed a partial correlation (rxy,z) higher than 0.90 and a Root Mean Square Error (RMSE) below 0.07 logMAR between the TFVA of SimVis Gekko simulations and Real MCLs across subjects. The validity of the simulation approach using SimVis Gekko and using experimental measurements obtained with Nimo TR-1504 was therefore confirmed by the clinical results obtained in this study, what opens the possibility of using this visual simulator to assist and speed up the fitting process of MCLs.

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