Article
Ophthalmology
Yunyun Chen, Chenglu Ding, Xue Li, Yingying Huang, Fengchao Zhou, Bjorn Drobe, Hao Chen, Jinhua Bao
Summary: The aim of this study was to evaluate the short-term effects of peripheral gradient high-addition multifocal soft contact lenses and orthokeratology on visual performance in myopic children. The results showed that both MFSCLs and Ortho-K lenses significantly increased aberrations compared to single-vision spectacles. MFSCLs performed slightly worse than Ortho-K lenses in terms of low-contrast visual acuity.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2023)
Article
Biochemical Research Methods
Shrilekha Vedhakrishnan, Maria Vinas, Sara Aissati, Susana Marcos
Summary: Visual simulators were used to simulate center-near aspheric multifocal contact lenses (MCLs) of different additions, and the visual performance with simulated MCLs was found to be approximately 20% better than with real MCLs. The study revealed that the profile of MCLs and the interactions with the eye's optics contribute significantly to visual performance.
BIOMEDICAL OPTICS EXPRESS
(2021)
Article
Ophthalmology
Thomas Reinhard, Philip Maier, Daniel Boehringer, Eckart Bertelmann, Tobias Brockmann, Laszlo Kiraly, David Salom, Matteo Piovella, Stephane Colonval, Javier Mendicute
Summary: The study found that AT LARA 829MP provided the widest monocular depth of focus at all distances, while TECNIS Symfony was superior to the monofocal control at 0.3 logMAR. Both EDOF intraocular lenses were significantly better than the monofocal ASPHINA at all levels for binocular depth of focus.
GRAEFES ARCHIVE FOR CLINICAL AND EXPERIMENTAL OPHTHALMOLOGY
(2021)
Article
Multidisciplinary Sciences
Shrilekha Vedhakrishnan, Maria Vinas, Clara Benedi-Garcia, Pilar Casado, Susana Marcos
Summary: A better understanding of visual performance with Multifocal Contact Lenses (MCLs) is important for both young eyes to control myopia progression and presbyopes to compensate for the lack of accommodation. This study evaluated the visual acuity of MCLs at different distances and found that MCLs improved near vision in both young adults and presbyopes, while maintaining far vision in young adults. Visual imbalance was also reduced with MCLs.
Article
Ophthalmology
Mehmet Orkun Sevik, Semra Akkaya Turhan, Ebru Toker
Summary: This study compared visual acuity and quality of life parameters of patients implanted with low add multifocal (MIOL) or extended depth of focus (EDOF) intraocular lens (IOL) for bilateral implantation. Results showed that patients with EDOF IOL had better visual performance at intermediate and near distances compared to those with MIOL.
Article
Ophthalmology
C. Talens-Estarelles, A. M. Garcia-Del Valle, S. Garcia-Lazaro
Summary: The study found that simultaneous-image multifocal contact lenses with central optical zone diameters of 80-90% and 90-100% of photopic pupil diameter provided better distance and intermediate visual acuity, without affecting near performance, and superior contrast sensitivity at medium and high spatial frequencies compared to lower central optical zone diameter designs.
CONTACT LENS & ANTERIOR EYE
(2022)
Article
Ophthalmology
Sotiris Plainis, Emmanouil Ktistakis, Miltiadis K. Tsilimbaris
Summary: This study evaluated the effectiveness of presbyopia correction with multifocal contact lenses using an eye-fixation based method of silent reading performance. The results showed that using multifocal contact lenses significantly improved the reading speed and eye fixation ability of presbyopic patients. Therefore, evaluating reading performance using eye fixation analysis can provide reliable outcomes for presbyopia correction.
CONTACT LENS & ANTERIOR EYE
(2023)
Article
Medicine, General & Internal
Majid Moshirfar, Seth R. Stapley, Wyatt M. Corbin, Nour Bundogji, Matthew Conley, Ines M. Darquea, Yasmyne C. Ronquillo, Phillip C. Hoopes
Summary: This study compares the visual and refractive performance of two multifocal intraocular lenses, TECNIS Synergy and AcrySof IQ PanOptix. The results show that there are differences in visual acuity and photic phenomena between the two lenses.
JOURNAL OF CLINICAL MEDICINE
(2022)
Article
Ophthalmology
Radhika Rampat, Damien Gatinel
Summary: The market for multifocal intraocular lenses is saturated with close to 100 options available, requiring ophthalmic surgeons to stay informed and make decisions based on thorough preoperative planning. Understanding the optical basis, range of vision targeted, and patient satisfaction levels are key in achieving customized spectacle independence with minimal photic phenomenon and contrast loss. Standardization of labeling and comparison methods for these lenses is also crucial for future research and development.
Article
Medicine, General & Internal
Meiyi Zhu, Wei Fan, Guangbin Zhang
Summary: This study compared the stereopsis and visual acuity between bilateral implantation of trifocal intraocular lenses (IOL) and blended implantation of an extended depth of focus (EDOF) IOL with a bifocal IOL. The results showed that the near stereoacuity of the blended group was worse, but there was no significant difference between the two groups in other measures.
FRONTIERS IN MEDICINE
(2022)
Article
Ophthalmology
Takahiro Hisai, Keita Takada, Shota Tokuda, Ryohei Nejima, Yosai Mori, Keiichiro Minami, Kazunori Miyata
Summary: Comparing long-term visual function between diffractive extended depth-of-focus (EDF) intraocular lenses (IOLs) and monofocal IOLs, it was found that the EDF IOLs provided better visual acuity at distances of 0.5 and 0.7 m. There were no differences in visual acuity at other distances, contrast sensitivities, or dynamic visual functions. The influence of posterior capsule opacification (PCO) on visual function was not observed in the EDF IOLs.
GRAEFES ARCHIVE FOR CLINICAL AND EXPERIMENTAL OPHTHALMOLOGY
(2023)
Article
Ophthalmology
Toshihiro Sakisaka, Keiichiro Minami, Keita Takada, Yosai Mori, Kazunori Miyata
Summary: This prospective study compared the visual function of eyes with diffractive EDOF intraocular lenses (IOLs) and monofocal IOLs. The results showed that EDOF IOLs provided better visual acuity at closer distances, with no significant differences in contrast sensitivities and dynamic visual function.
Article
Optics
Mike Chih-Wei Yeh, John Ching-Jen Hsiao, Dorcas Tsang, Frank Spors, Ching-Ying Cheng
Summary: The purpose of this study was to compare the effects of different types of soft contact lenses on peripheral refraction, higher-order aberrations, horizontal coma, and visual quality in young myopic adults. The results showed that the SoftOK and MiSight lenses performed better in terms of relative peripheral refraction, myopic defocus, and horizontal coma. The MiSight lens slightly reduced accommodative amplitude, and the SoftOK lens had significantly higher spherical aberration compared to the other lenses. However, the differences in horizontal coma were not statistically significant.
Article
Medicine, General & Internal
Luis Salva, Scott Garcia, Salvador Garcia-Delpech, Anabel Martinez-Espert, Diego Montagud-Martinez, Vicente Ferrando
Summary: Evaluating chromatic aberration of MIOLs in vitro is crucial for optimizing surgical outcomes. Comparing refractive and diffractive designs, we observed distinct haloes and opposite signs of LCA at near foci, highlighting the impact of optical design on MIOL performance under polychromatic light. This study provides valuable information for vision care professionals to select the most suitable lens for each patient.
JOURNAL OF CLINICAL MEDICINE
(2023)
Article
Ophthalmology
Jennifer Swingle Fogt, Kimberly Weisenberger, Nick Fogt
Summary: This study found that multifocal contact lenses provide functional vision performance comparable to progressive addition lenses (PAL) spectacles, and patients may prefer using multifocal contact lenses.
CONTACT LENS & ANTERIOR EYE
(2022)
Article
Ophthalmology
David A. Atchison, Marwan Suheimat, Stanislovas Zacharovas, Charles E. Campbell
Summary: Through simulations, it was found that Grand-Seiko autorefractors with annular targets are likely to provide valid peripheral refractions. The results were closer to Zernike refractions and spherical aberration had up to 0.5D impact on refraction, while peripheral coma had limited influence.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2022)
Article
Ophthalmology
Charles E. Campbell, Marwan Suheimat, Stanislovas Zacharovas, David A. Atchison
Summary: The study focused on the optical principles and properties of autorefractors that use the image-size principle. It was found that when light is diverging, hyperopia produces greater retinal image sizes than myopia; conversely, when light is converging, the opposite is true.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2022)
Article
Ophthalmology
Durgasri Jaisankar, Marwan Suheimat, Robert Rosen, David A. Atchison
Summary: This study aimed to investigate whether human peripheral vision can detect local depressions (notches) in CSF, and found that notches were identified in defocused monochromatic CSFs in peripheral vision when all other monochromatic ocular aberrations were corrected, especially with adequate spatial frequency sampling.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2022)
Article
Ophthalmology
David A. Atchison
Summary: This study uses simulations to investigate the effect of lateral misalignment of the Grand-Seiko WR-5100K autorefractor on peripheral refraction. The results show that misalignment causes significant errors in peripheral refraction, with greater effects when misalignment and visual field are in opposite directions.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2022)
Article
Ophthalmology
David A. Atchison, Thien Nguyen, Katrina L. Schmid, Archayeeta Rakshit, Alex S. Baldwin, Robert F. Hess
Summary: The purpose of this study was to simulate lens-induced and screen-induced aniseikonia and evaluate their effects on stereopsis. The results showed that the screen-based method was not always successful in simulating the effects of lens-induced aniseikonia on stereopsis. However, the computer-based method was reasonably successful in neutralizing refractive aniseikonia, especially for overall and x180 meridional aniseikonia.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2022)
Article
Ophthalmology
David A. Atchison, Jos J. Rozema
Summary: This study provides an overview of the misconceptions and potential artefacts associated with measuring peripheral refractive error and eye length, and discusses their implications for determining retinal shape and myopia development. Several issues were identified, such as the relationship between peripheral refractive error and myopia development, and the accuracy of measuring peripheral eye length using an optical biometer. Some of these issues can be addressed, while others require further investigation.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2023)
Article
Ophthalmology
Dinesh Kaphle, Katrina L. Schmid, Marwan Suheimat, Scott A. Read, David A. Atchison
Summary: The purpose of this study was to investigate the relationship between peripheral choroid thickness and eye length changes during accommodation. The results showed that eye length increased with accommodation, while the choroid thinned. The thinning of the choroid accounted for approximately 60% of the eye length increase.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2023)
Article
Ophthalmology
Annabelle Seddon, Hanna M. Chaki, Hang-My J. D. Phan, Jessica G. Spink, Matthew L. P. Ha, Surini Wijesuriya, David A. Atchison, Andrew Carkeet
Summary: This study investigated how unequal image sizes between the eyes affect visual acuity. The results showed that induced aniseikonia slightly reduced binocular visual acuity, but the change was small and cannot be used as a diagnostic marker in clinical settings.
CLINICAL AND EXPERIMENTAL OPTOMETRY
(2023)
Article
Ophthalmology
Sotiris Plainis, Emmanouil Ktistakis, Panagiotis Sapountzis, W. Neil Charman
Summary: This study aims to re-examine the changes in individual refraction patterns at different ages and explain the increased prevalence of myopia in Asian children. The study found that there was little change in refractive error distributions for 6-year-old children during the studied period, but a subset of 12-year-old children failed to maintain emmetropia, resulting in an increase in myopia. The conclusion of this study is that the rise in myopia prevalence among Japanese children is attributed to an increased proportion of children losing emmetropia between the ages of 6 and 12.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2023)
Article
Ophthalmology
Sotiris Plainis, Emmanouil Ktistakis, Miltiadis K. Tsilimbaris
Summary: This study evaluated the effectiveness of presbyopia correction with multifocal contact lenses using an eye-fixation based method of silent reading performance. The results showed that using multifocal contact lenses significantly improved the reading speed and eye fixation ability of presbyopic patients. Therefore, evaluating reading performance using eye fixation analysis can provide reliable outcomes for presbyopia correction.
CONTACT LENS & ANTERIOR EYE
(2023)
Article
Ophthalmology
Emmanouil Ktistakis, Angeliki Gleni, Miltiadis K. Tsilimbaris, Sotiris Plainis
Summary: This study compared eye movement-based silent reading performance for standardised short sentences and paragraphs. The results showed that paragraphs had better repeatability and could provide a reliable biomarker of visuo-motor function, making them preferable to short sentences when evaluating silent comprehensive reading.
CLINICAL AND EXPERIMENTAL OPTOMETRY
(2023)
Article
Ophthalmology
Martin de Tomas, Abel Szeps, Gabriel Martin, Juan Manuel Suarez, David A. Atchison, Jos J. Rozema, Rafael Iribarren
Summary: This study analyzed OCT images of retinal shadows caused by defocus and diffusion optics spectacles. The results showed obvious retinal shadows in the periphery of the images, while the central area remained clear. The discrepancy between the actual size of the shadows and their appearance in the OCT images was attributed to the scanning OCT beam not being parallel to the optical axis. With device-specific correction, retinal OCT images can help visualize the regions affected by defocus or lowered contrast induced by myopia control spectacles.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2023)
Article
Ophthalmology
Anastasia Papachristou, Argiri Lambraki, Trisevgeni Giannakopoulou, Miltiadis K. Tsilimbaris, Sotiris Plainis
Summary: This study investigates the hypothesis that silicone oil causes insulation effects on the retina by affecting its response to light. Electrophysiological responses to a flash stimulus were recorded in patients who underwent surgery for retinal detachment, before and after silicone oil removal. The study found statistically significant differences in the amplitudes of the ERG responses and their corresponding ratios, indicating that silicone oil reduces the flash ERG responses.
JOURNAL OF OPTOMETRY
(2024)
Article
Ophthalmology
Sotiris Plainis, Sophia Panagopoulou, W. Neil Charman
Summary: The study found that the amplitude of accommodation decreases linearly with age as complete presbyopia is approached, while the slope of the response/stimulus curve also decreases. Pupil size decreases with age but continues to constrict. Ocular spherical aberration is linearly related to accommodation response and decreases with age.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2023)
Article
Ophthalmology
David A. Atchison, David L. Cooke
Summary: A thin lens technique was developed to determine how the effective powers of toric monofocal intraocular lenses (IOLs) are influenced by tilt and refractive errors. The correction required at the front of the eye and the power of an IOL that would compensate for the tilt were determined through a series of steps.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2023)