Laboratory analysis and ray visualization of diffractive optics with enhanced intermediate vision

Son, Hyeck-Soo; Łabuz, Grzegorz; Khoramnia, Ramin; Yildirim, Timur M.

doi:10.1186/s12886-021-01958-8

Cited by 6 publications

(5 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The EDOF effect AT LARA 829MP IOL was previously studied with different commercial instruments using monochromatic light (546 nm) [ 8 , 28 ]. In these works, images of the USAF test were obtained showing a depth of focus of 2.00 D, although both studies evidenced the bifocal behavior of the lens.…”

Section: Discussionmentioning

confidence: 99%

In Vitro Chromatic Performance of Three Presbyopia-Correcting Intraocular Lenses with Different Optical Designs

Montagud-Martínez

Ferrando

Martínez-Espert

et al. 2022

JCM

View full text Add to dashboard Cite

Most of the new premium models of intraocular lenses for presbyopia correction use diffractive optics in their optical design. The presence of multiple foci and the difference of the diffractive efficiency for different wavelengths have a great impact in the lens optical performance. In this context, there is a limited information available for clinicians to understand the optical principles that differentiate each design and their potential influence on clinical outcomes. Optical bench studies with polychromatic light are necessary to solve this limitation. In this work, a custom made optical bench was employed to assess with polychromatic light the through the focus optical quality of three different IOL designs: trifocal, EDOF effect; and enhanced monofocal. By using different and complimentary approaches: images of the USAF test, axial PSFs and TF-MTFs, each design revealed its intrinsic features, which were not previously reported for these IOLs models in a comparative way. It was found that the chromatic aberration plays a very important role in the performance of each IOL. Our results could help clinicians to understand the optical principle of each lens and also provide useful information for choosing the lens that best suits the needs of the individual patient.

show abstract

Section: Discussionmentioning

confidence: 99%

In Vitro Chromatic Performance of Three Presbyopia-Correcting Intraocular Lenses with Different Optical Designs

Montagud-Martínez

Ferrando

Martínez-Espert

et al. 2022

JCM

View full text Add to dashboard Cite

show abstract

“…For the Acrysof IQ Vivity IOL, only one peak was seen in the through-focus response at the 3 mm aperture, with an extended depth of focus of 2.20 diopters [ 34 ]. For the Symfony and the AT Lara, however, it was reported that the through-focus MTF curves showed two peaks for the 3 mm pupil size [ 5 , 6 ].…”

Section: Discussionmentioning

confidence: 99%

“…The Symfony ZXR00 and the AT Lara 829 MP are low-add bifocal lenses [ 5 , 6 ] that rely on diffractive technology to create an extended depth of focus effect [ 5 , 6 , 7 , 8 , 9 ]. Both IOLs apply the first- and second-order diffraction for a far and an intermediate focus, which enables a simulation correction of longitudinal chromatic aberration at both foci [ 7 , 8 , 9 ].…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Visualization of Ray Propagation through Extended Depth-of-Focus Intraocular Lenses

et al. 2022

View full text Add to dashboard Cite

Extended depth-of-focus (EDoF) presbyopia-correcting intraocular lens (IOL) models differ in their optical design and performance. In the laboratory, we compared the ray propagation and light intensity profiles of four IOLs: the non-diffractive AcrySof IQ Vivity (Alcon Inc., Fort Worth, TX, USA) and two diffractive models, Symfony ZXR00 (Johnson & Johnson Vision, Jacksonville, FL, USA) and AT Lara 829 MP (Carl Zeiss Meditec, Berlin, Germany). A fourth lens, the monofocal AcrySof IQ SN60WF (Alcon Inc.) acted as the control. We projected a 520 nm laser light through each submerged lens in a bath of fluorescein solution. A camera mounted on a microscope captured the light that emerged from the IOL. We recorded the IOLs’ point spread function (PSF) to determine the presence of unwanted visual effects. The ray propagation visualization and light intensity profile of the monofocal control showed one distinct focus, while the AcrySof IQ Vivity demonstrated an extended focus area. We observed two distinct foci with each diffractive IOL. We found a lower level of light spread beyond the PSF center for the AcrySof IQ Vivity compared to the diffractive IOLs. In conclusion, we could confirm the extended range of focus for all the EDoF IOL models. However, the non-diffractive AcrySof IQ Vivity appears to have a smoother transition from a far to an intermediate range. We discuss whether, in clinical use, the higher level of spurious light we found in the diffractive designs may translate into increased dysphotopsia.

show abstract

“…MTF data were analyzed using routines written in MATLAB (MathWorks, Portola Valley, CA, USA). The wide MTF value between 0 and 1 and the low standard deviation of optical quality measurements, typically between 0 and 0.02 [ 21 ], eliminate the need to apply statistical difference tests between IOLs.…”

Section: Methodsmentioning

confidence: 99%

Comparison of a Presbyopia-Correcting Supplementary Intraocular Lens Combination and a Capsular-Bag Lens: An In Vitro Study

et al. 2023

Self Cite

View full text Add to dashboard Cite

We evaluated the optical quality of two approaches to trifocality: polypseudophakia versus monopseudophakia. The combination (polypseudophakia) of a monofocal Basis Z B1AWY0 and AddOn Trifocal A4DW0M intraocular lens (IOL) was compared to using one Basis Z Trifocal B1EWYN IOL, all from 1stQ GmbH. In both approaches, we measured modulation transfer function (MTF) and Strehl Ratio (SR) values at 3.0 and 4.5 mm pupil sizes. We determined the through-focus (TF) MTF at 25, 50 and 100 lp/mm for the 3 mm aperture. United States Air Force (USAF) target images were recorded. MTF measurement of the trifocal lens and the combined monofocal and trifocal AddOn IOL showed good performance at the far and near focus for the 3 mm aperture. For the 4.5 mm aperture the MTF improved for the far focus but decreased for the intermediate and near focus. TF MTF showed better contrast at the far focus for the polypseudophakic setup but at the expense of the efficiency at the near focus. However, the USAF chart images revealed only minimal differences between both approaches. The optical quality of the polypseudophakic approach was not affected by the presence of two IOLs instead of one and proved to be comparable with the performance of one capsular-bag-fixated trifocal IOL. Differences between the single vs. two-lens approach seen in the TF MTF analysis could be attributed to the optical design that varied between the trifocal models.

show abstract

Laboratory analysis and ray visualization of diffractive optics with enhanced intermediate vision

Cited by 6 publications

References 21 publications

In Vitro Chromatic Performance of Three Presbyopia-Correcting Intraocular Lenses with Different Optical Designs

In Vitro Chromatic Performance of Three Presbyopia-Correcting Intraocular Lenses with Different Optical Designs

Visualization of Ray Propagation through Extended Depth-of-Focus Intraocular Lenses

Comparison of a Presbyopia-Correcting Supplementary Intraocular Lens Combination and a Capsular-Bag Lens: An In Vitro Study

Contact Info

Product

Resources

About