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Xing Y, Liu Y, Li K, Song H, Xu M, zhang J, Liu H, Zhang H, Wang Y. Fabrication and performance evaluation of a design for an extended depth-of-focus intraocular lens based on an improved sinusoidal profile. BIOMEDICAL OPTICS EXPRESS 2024; 15:3932-3949. [PMID: 38867771 PMCID: PMC11166450 DOI: 10.1364/boe.521105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 05/19/2024] [Accepted: 05/19/2024] [Indexed: 06/14/2024]
Abstract
This study presents the fabrication and evaluation of a sinusoidal extended depth-of-focus (EDoF) intraocular lens (IOL) based on our previously proposed design approach. The power, through-focus MTF, and surface profile were measured using commercial instruments. Through-focus images of a United States Air Force (USAF) 1951 resolution target formed by the fabricated IOL were compared with Symfony and AR40E under monochromatic and polychromatic light using optical bench testing. Simulations assessed visual acuity (VA) of a pseudophakic model eye with the EDoF IOL, including evaluation of tilt and decentration effects. Results indicate that the base power, add power, and the through-focus MTF@50 lp/mm of the fabricated IOL at a 3 mm pupil size align with the design specifications. The extended-depth-of-focus and imaging performance for the far vision of the fabricated IOL under both monochromatic and polychromatic light conditions at a 3.0 mm pupil diameter is comparable to that of Symfony. In addition, the fabricated IOL exhibits a similar extended-depth-of-focus for three discrete wavelengths. The pseudophakic model eye with the designed EDoF IOL demonstrates a VA exceeding 0.1 logMAR within a defocus range of 2.44 D. The VA is tolerant to both IOL tilt and decentration. These findings demonstrate the promising potential of the sinusoidal EDoF IOL design for future applications in cataract surgery.
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Affiliation(s)
- Yuwei Xing
- Tianjin Key Laboratory of Micro-scale
Optical Information Science and Technology, Institute of Modern
Optics, Nankai University, Tianjin 300350, China Nankai University, Tianjin
300350, China
| | - Yongji Liu
- Tianjin Key Laboratory of Micro-scale
Optical Information Science and Technology, Institute of Modern
Optics, Nankai University, Tianjin 300350, China Nankai University, Tianjin
300350, China
- Nankai University Eye Institute, Nankai University
Affiliated Eye Hospital, Nankai University, 38 Tongyan Road, Haihe Education Park, Tianjin
300350, China
| | - Kunqi Li
- Tianjin Key Laboratory of Micro-scale
Optical Information Science and Technology, Institute of Modern
Optics, Nankai University, Tianjin 300350, China Nankai University, Tianjin
300350, China
| | - Hui Song
- Tianjin Key Laboratory of Retinal Functions
and Diseases, Tianjin Branch of National Clinical Research Center for
Ocular Disease, Eye Institute and School of Optometry,
Tianjin Medical University Eye Hospital,
Tianjin 300392, China
| | - Mengchen Xu
- Advanced Ophthalmology
Laboratory (AOL), Robotrak Technologies, Nanjing 210000,
China
| | - Jie zhang
- Advanced Ophthalmology
Laboratory (AOL), Robotrak Technologies, Nanjing 210000,
China
| | - Hongliang Liu
- Tianjin Key Laboratory of Micro-scale
Optical Information Science and Technology, Institute of Modern
Optics, Nankai University, Tianjin 300350, China Nankai University, Tianjin
300350, China
| | - Hangjian Zhang
- Tianjin Key Laboratory of Micro-scale
Optical Information Science and Technology, Institute of Modern
Optics, Nankai University, Tianjin 300350, China Nankai University, Tianjin
300350, China
| | - Yan Wang
- Nankai University Eye Institute, Nankai University
Affiliated Eye Hospital, Nankai University, 38 Tongyan Road, Haihe Education Park, Tianjin
300350, China
- Tianjin Key Laboratory of Ophthalmology and
Visual Science, Tianjin Eye Institute,
Tianjin Eye Hospital, 4 Gansu Rd, Tianjin 300020, China
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Salvá L, García S, García-Delpech S, Martínez-Espert A, Montagud-Martínez D, Ferrando V. Comparison of the Polychromatic Image Quality of Two Refractive-Segmented and Two Diffractive Multifocal Intraocular Lenses. J Clin Med 2023; 12:4678. [PMID: 37510792 PMCID: PMC10380361 DOI: 10.3390/jcm12144678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 07/11/2023] [Accepted: 07/12/2023] [Indexed: 07/30/2023] Open
Abstract
Evaluating chromatic aberration for a multifocal intraocular lens (MIOL) in vitro is essential for studying its performance because it helps determine the most appropriate lens for each patient, enhancing surgical outcomes. While refractive MIOLs with angular power variation have shown positive clinical outcomes, studies of these MIOLs on optical benches primarily employed monochromatic green light, neglecting the impact of longitudinal chromatic aberration (LCA) on MIOL performance. To address this gap, we evaluated the through-focus modulation transfer function (TF-MTF) and the point spread function (PSF) of two refractive segmented extended depth of focus intraocular lenses (IOLs) (Femtis Comfort and Precizon Presbyopic), comparing the results with those obtained with two widely known diffractive multifocal intraocular lenses (AcrySof IQ ReSTOR and FineVision Pod F). Measurements of the TF-MTF were conducted using both monochromatic and polychromatic light in a customized optical bench. The refractive designs exhibited distinct haloes in the PSFs. When comparing the refractive and diffractive designs, opposite signs of LCA were observed at near foci. These findings emphasize the influence of the optical design of IOLs on their performance under polychromatic light, providing valuable information for vision care professionals when selecting the most suitable lens for each patient.
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Affiliation(s)
- Luis Salvá
- Oftalmedic Salvà, 07013 Palma de Mallorca, Spain
| | - Scott García
- Oftalmedic Salvà, 07013 Palma de Mallorca, Spain
| | | | - Anabel Martínez-Espert
- Departamento de Óptica, Optometría y CC de la Visión, Universitat de València, 46100 Valencia, Spain
| | - Diego Montagud-Martínez
- Departamento de Óptica, Optometría y CC de la Visión, Universitat de València, 46100 Valencia, Spain
- Centro de Tecnologías Físicas, Universitat Politècnica de València, 46022 Valencia, Spain
| | - Vicente Ferrando
- Centro de Tecnologías Físicas, Universitat Politècnica de València, 46022 Valencia, Spain
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Yan W, Auffarth GU, Khoramnia R, Łabuz G. Spectral Effects and Range of Focus in a Multizonal-Refractive Intraocular Lens Compared with a Standard Trifocal Diffractive Design. Ophthalmol Ther 2023; 12:1621-1634. [PMID: 36890349 PMCID: PMC10164215 DOI: 10.1007/s40123-023-00679-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 02/06/2023] [Indexed: 03/10/2023] Open
Abstract
INTRODUCTION This study was performed to compare the optical performance of a multizonal presbyopia-correcting intraocular lens (IOL) and a conventional trifocal model. METHODS The optical quality and simulated visual acuity (VA) of 570 Precizon Presbyopic NVA (OPHTEC BV) and AcrySof IQ PanOptix (Alcon) were compared. The Precizon features a refractive design consisting of alternating optical zones that converge the incident light into two principal foci and a transitional zone for intermediate vision. By contrast, the PanOptix applies a diffractive (non-apodized) profile to achieve trifocality. Simulated VA was derived from the modulation transfer function. Chromatic aberration effects were also studied. RESULTS The diffractive and multizonal-refractive lenses yielded comparable simulated VAs at far focus (0.00 logMAR). All curves showed a reduction in expected VA with an increase in negative defocus. At - 1.0 D, the multizonal-refractive IOL's VA dropped by 0.05 logMAR, but for the diffractive model, it was one line (0.11 logMAR). The multizonal-refractive lens's VA prediction at the secondary peak was 0.03 logMAR-minimally better than the 0.06 logMAR of the diffractive lens at - 2.5 D. The refractive lens exhibited a 24% decrease in polychromatic optical quality due to material dispersion. The performance of PanOptix was more substantially affected, showing a 44% loss at 50 lp/mm at far, with minimal effects at other distances. CONCLUSION The multizonal-refractive lens does not fall short of the established trifocal IOL, and it can be used to extend the visual range of pseudophakic patients. Although the multizonal-refractive lens has lower material dispersion, the diffractive model corrects chromatism beyond far focus.
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Affiliation(s)
- Weijia Yan
- Department of Ophthalmology, The David J. Apple Center for Vision Research, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany
| | - Gerd U Auffarth
- Department of Ophthalmology, The David J. Apple Center for Vision Research, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany.
| | - Ramin Khoramnia
- Department of Ophthalmology, The David J. Apple Center for Vision Research, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany
| | - Grzegorz Łabuz
- Department of Ophthalmology, The David J. Apple Center for Vision Research, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany
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Poyales F, Garzón N, Rico L, Zhou Y, Millán MS, Vega F. Comparison of visual performance between two aspheric monofocal intraocular lens models. Clin Exp Optom 2023; 106:29-35. [PMID: 34875207 DOI: 10.1080/08164622.2021.2009737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
CLINICAL RELEVANCE It is important to distinguish between visual acuity, optical quality and quality of vision when outcomes obtained with intraocular lenses are evaluated. These parameters, that includeobjective and subjective tests, should be assessed to obtain results that are not biased. BACKGROUND To assess the difference in visual and optical quality between two monofocal intraocular lens models. METHODS : This was a prospective, parallel and randomised clinical study conducted at Miranza IOA, a private clinic in Madrid, Spain. Sixty patients were implanted bilaterally, 30 per group, with two aspheric IOLs with induced spherical aberration of -0.27 μm for Group A and -0.20 μm for Group B. Visual outcomes obtained at 1 and 3 months after surgery included both uncorrected (UCVA) and corrected monocular distance visual acuity (DCVA), objective scattering index (OSI), modulation transfer function (MTF) cut-off, Strehl Ratio (SR), contrast sensitivity defocus curve (CSDC), intraocular lens spherical aberration (SA), and longitudinal chromatic aberration of the eye. Activity limitations in daily life were assessed using CatQuest-9SF questionnaire. RESULTS There were statistically significant differences for DCVA (0.04 LogMAR; p = .008) and SR (0.03; p = .003) between groups. Outcomes related to CSDC showed statistically significant differences for vergences between -0.50 D and +1.00 D (3 mm pupil) and for vergences of 0.00 D and +0.50 D (4.5 mm pupil) between groups. Overall, Group A showed better results regarding visual and optical quality, including a lower longitudinal chromatic aberration result in comparison to Group B. Patient satisfaction evaluated with CatQuest-9SF showed that Group A achieved better outcomes, although the differences were statistically significant only for the 'Reading text on television' item (p = 0.027). CONCLUSIONS Both intraocular lens models showed excellent quantity of vision, optical and visual quality as well as high patient satisfaction. Despite this, the the Group A model provided slightly better outcomes than the Group B model.
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Affiliation(s)
| | - Nuria Garzón
- Ophthalmology Department, Miranza IOA, Madrid, Spain.,Departamento Optometría y Visión, Universidad Complutense de Madrid, Madrid, Spain
| | - Laura Rico
- Ophthalmology Department, Miranza IOA, Madrid, Spain
| | - Ying Zhou
- Ophthalmology Department, Miranza IOA, Madrid, Spain
| | - María S Millán
- Departament d'Òptica i, Universitat Politècnica de Catalunya-BarcelonaTech, Spain
| | - Fidel Vega
- Departament d'Òptica i, Universitat Politècnica de Catalunya-BarcelonaTech, Spain
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Duan L, Dang G, Ge J, Gao Y, Wang L. Visual function assessment of Chinese cataract patients after individual aspheric intraocular lens implantation according to preoperative cornea spherical aberration. Technol Health Care 2022; 31:831-839. [PMID: 36442220 DOI: 10.3233/thc-220154] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
BACKGROUND: Aspheric intraocular lens (IOLs) implantation has been widely applied in cataract surgery. However, there is no consensus on the optimal guidance for the operations in IOLs implantation. OBJECTIVE: This study evaluated the visual function of Chinese cataract patients six months after cataract surgery with two different guiding ideologies. METHODS: We evaluated 50 patients (61 eyes) with implantation of different aspheric IOLs (SN60WF IOLs, ZCB00 IOLs, PY-60AD IOLs, AO IOLs) 6 months after cataract surgery. Twenty-four patients (30 eyes) under individual implantation were ascribed to group 1 and 26 patients (31 eyes) with randomized implantation were ascribed to the control group (group 2). Postoperatively parameters included monocular best-corrected visual acuity (BCVA), contrast sensitivity (CS), total spherical aberration Z (4, 0) at 5 mm pupil size, and patient satisfaction. The quality of life after operation was assessed through the National Eye Institute Visual Function Questionnaire-25 (NEI VFQ-25). RESULTS: Six months after cataract operation, the contrast sensitivity with glare of group 1 at 2.5∘ was 0.697 ± 0.027, and 0.532 ± 0.049 in group 2. Besides, there was no significant difference at any other special frequency. The mean spherical aberration Z (4, 0) at 5 mm pupil size in group 1 was 0.015 ± 0.028 um, and in group 2 was 0.043 ± 0.109 um, with a significant difference (p< 0.01). The mean scores obtained from NEI VFQ-25 were not significantly different. CONCLUSION: It is effective to implant aspheric IOLs individually according to preoperative corneal spherical aberration. Patients obtained better contrast sensitivity with glare at 2.5∘, but there was no significant difference in BCVA, contrast sensitivity at other special frequency, and subjective visual function.
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Affiliation(s)
- Lian Duan
- Department of Ophthalmology, Qianfoshan Hospital Affiliated to Shandong University, Jinan, Shandong, China
- Department of Ophthalmology, Qianfoshan Hospital Affiliated to Shandong University, Jinan, Shandong, China
| | - Guangfu Dang
- Department of Ophthalmology, Qianfoshan Hospital Affiliated to Shandong University, Jinan, Shandong, China
- Department of Ophthalmology, Qianfoshan Hospital Affiliated to Shandong University, Jinan, Shandong, China
| | - Jinling Ge
- Mingshui Eye Hospital, Jinan, Shandong, China
- Department of Ophthalmology, Qianfoshan Hospital Affiliated to Shandong University, Jinan, Shandong, China
| | - Yang Gao
- Department of Ophthalmology, Qianfoshan Hospital Affiliated to Shandong University, Jinan, Shandong, China
| | - Lihua Wang
- Department of Ophthalmology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, China
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Understanding In Vivo Chromatic Aberrations in Pseudophakic Eyes Using on Bench and Computational Approaches. PHOTONICS 2022. [DOI: 10.3390/photonics9040226] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Diffractive multifocal intraocular lenses (IOLs) modulate chromatic aberration and reduce it at certain distances due to interactions between the refractive and diffractive chromatic components. However, the extent to which computer modeling and on bench measurements of IOL chromatic aberration translate to chromatic aberration in patients implanted with these multifocal IOLs (MIOLs) is not yet fully understood. In this study, we compare the chromatic difference of focus and longitudinal chromatic aberrations in pseudophakic patients implanted with different IOL designs (monofocal and trifocal IOLs) and materials (hydrophobic and hydrophilic), and compared them with predictions from computer eye models and on bench measurements with the same IOLs. Patient data consisted of results from 63 pseudophakic eyes reported in four different studies and obtained psychophysically in the visual testing channel of a custom-developed polychromatic adaptive optics system. Computational predictions were obtained using ray tracing on computer eye models, and modulation transfer function (MTF) on bench measurements on physical eye models. We found that LCA (in vivo/simulated) for far vision was 1.37 ± 0.08 D/1.19 D for monofocal hydrophobic, 1.21 ± 0.08 D/0.88 D for monofocal hydrophilic, 0.99 ± 0.06 D/1.19 D for MIOL hydrophobic, and 0.82 ± 0.05 D/0.88 D for MIOL hydrophilic. For intermediate and near vision, LCA (in vivo/simulated) was 0.67 ± 0.10 D/0.75 D and 0.23 ± 0.08 D/0.19 D for MIOL hydrophobic and 0.27 ± 0.15 D/0.38 D and 0.15 ± 0.15 D/−0.13 D for MIOL hydrophilic, respectively. In conclusion, computational ray tracing and on bench measurements allowed for evaluating in vivo chromatic aberration with different materials and designs for multifocal diffractive intraocular lenses.
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García S, Salvá L, García-Delpech S, Martínez-Espert A, Ferrando V, Montagud-Martínez D. Polychromatic Assessment of a Refractive Segmented EDOF Intraocular Lens. J Clin Med 2022; 11:jcm11061480. [PMID: 35329805 PMCID: PMC8954764 DOI: 10.3390/jcm11061480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 03/03/2022] [Accepted: 03/04/2022] [Indexed: 11/23/2022] Open
Abstract
This study aimed to evaluate in vitro performance refractive segmented EDOF intraocular lenses under polychromatic light using an optical bench that complies with the ISO 11979-2 Norm. The through focus modulation transfer function (TF-MTF) of the Femtis Comfort LS-313 MF15 (Oculentis GmbH, Berlin, Germany) IOL was evaluated for IOLs with three different base powers. The effect of the asymmetry of the segmented designs was evaluated with 3 different wavelengths and with polychromatic light at a 3.0 mm and 5.0 mm pupil diameter. It was demonstrated that the TF-MTF curves exhibit a bifocal profile that, in practice, results in an EDOF design. As a consequence of the LCA, the TF-MTF values in white light were lower than in monochromatic light. Images of the USAF test chart were obtained to confirm the prediction of the TF-MTFs. We found that Femtis Comfort is a bifocal low-addition IOL and this fact can result in an EDOF effect which was obtained previously in clinical trials. Moreover, we showed that the base power influences the IOL optical quality, which results as more effective for high powers (hyperopic eyes) than for low powers (myopic eyes). The LCA of the segmented refractive design was very low and presumably not clinically relevant.
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Affiliation(s)
- Scott García
- Oftalmedic Salvá, 07013 Palma de Mallorca, Spain; (S.G.); (L.S.)
| | - Luís Salvá
- Oftalmedic Salvá, 07013 Palma de Mallorca, Spain; (S.G.); (L.S.)
| | | | - Anabel Martínez-Espert
- Fundación Aiken, 46004 Valencia, Spain;
- Departamento de Óptica, Optometría y CC de la Visión, Universitat de València, 46100 Valencia, Spain;
| | - Vicente Ferrando
- Centro de Tecnologías Físicas, Universitat Politècnica de València, 46022 Valencia, Spain;
| | - Diego Montagud-Martínez
- Departamento de Óptica, Optometría y CC de la Visión, Universitat de València, 46100 Valencia, Spain;
- Centro de Tecnologías Físicas, Universitat Politècnica de València, 46022 Valencia, Spain;
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