2020
DOI: 10.1167/tvst.9.10.20
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Optical and Visual Quality With Physical and Visually Simulated Presbyopic Multifocal Contact Lenses

Abstract: As multifocal contact lenses (MCLs) expand as a solution for presbyopia correction, a better understanding of their optical and visual performance becomes essential. Also, providing subjects with the experience of multifocal vision before contact lens fitting becomes critical, both to systematically test different multifocal designs and to optimize selection in the clinic. In this study, we evaluated the ability of a simultaneous vision visual simulator (SimVis) to represent MCLs. Methods: Through focus (TF) o… Show more

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Cited by 22 publications
(17 citation statements)
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“…The zero-defocus setting for each condition was the average of five best-focus readings. Deviations in the best focus with MCLs from the NoLens did not vary more than 0.375/0.50/0.50D across conditions (LowAdd/MediumAdd/HighAdd), consistent with the expected focus shift produced by these MCLs [ 36 , 39 ] and confirming that the far focus (and not a near focus) was always selected for distance vision.…”
Section: Methodssupporting
confidence: 73%
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“…The zero-defocus setting for each condition was the average of five best-focus readings. Deviations in the best focus with MCLs from the NoLens did not vary more than 0.375/0.50/0.50D across conditions (LowAdd/MediumAdd/HighAdd), consistent with the expected focus shift produced by these MCLs [ 36 , 39 ] and confirming that the far focus (and not a near focus) was always selected for distance vision.…”
Section: Methodssupporting
confidence: 73%
“…In order to reduce the number of variables in the study, all subjects used the same -2 D distance corrected contact lens (independent of their refraction), and the residual defocus was corrected with a Badal system. A previous study with the same MCLs calculated the TF optical performance of the multifocal lenses (based on their theoretical power profile), which was used as the basis for simulations of the lenses in a Simultaneous Vision Simulator [ 36 , 45 , 46 ] and a Spatial Light Modulator in an Adaptative Optics system [ 39 ]. TFVA was measured with the MCLs on the eye and the equivalent SimVis simulated lenses in presbyopic subjects.…”
Section: Discussionmentioning
confidence: 99%
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“…A custom-developed polychromatic AO system at the Visual Optics and Biophotonics Lab (Institute of Optics, Spanish National Research Council, IO-CSIC, Madrid, Spain) was used in this study to correct the subject's aberrations and to induce aberrations in on-bench control experiments. The system and all its channels have been described in detail in previous publications ( Vinas et al, 2015 ; Marcos et al, 2017 ; Vinas, Aissati, et al, 2019 ; Vinas, Benedi-Garcia, et al, 2019 ; Aissati et al, 2020 ; Marcos et al, 2020 ; Vinas et al, 2020 ). The main channels used in this study of the system are as follows: The illumination channel, composed of a Supercontinuum Laser Source (SCLS, SC400 femtopower 1060 supercontinuum laser; Fianium Ltd, Southampton, United Kingdom, UK), in combination with an acusto-optic tunable filter (AOTF) module (FYLA LASER S.L, Valencia, Spain), which is controlled by radiofrequency drivers and selects the appropriate wavelength in visible light automatically (450–700 nm).…”
Section: Methodsmentioning
confidence: 99%