Article
Microscopy
Shigeyuki Morishita, Hidetaka Sawada
Summary: Spherical aberration correctors using hexapole fields are widely used and are pivotal in atomic-resolution imaging. Two types of spherical aberration correctors, a four-hexapole corrector and a two-hexapole corrector, were proposed to compensate for higher-order geometrical aberrations.
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
Medicine, General & Internal
Isabella D. Baur, Gerd U. Auffarth, Weijia Yan, Grzegorz Labuz, Ramin Khoramnia
Summary: In this experiment, four different intraocular lens (IOL) models were compared to evaluate their optical performance. The results showed that all the extended depth-of-focus (EDoF) IOL models had an extended range of focus, with the non-diffractive AcrySof IQ Vivity demonstrating a smoother transition compared to the diffractive models. The study also raised the question of potential increased visual disturbances with the diffractive designs.
Article
Ophthalmology
Ruediger Schmid, Andreas F. Borkenstein
Summary: The study analyzed four new wavefront-shaped IOLs and found that spherical aberration (SA) of different orders was the main modified aberration. RaySof EMV showed a moderate increase in Z 4-0, while Eyhance and Vivity had a considerable increase in negative Z 4-0. LuxSmart showed a combination of Z 4-0 and Z 6-0 with an opposite sign.
GRAEFES ARCHIVE FOR CLINICAL AND EXPERIMENTAL OPHTHALMOLOGY
(2022)
Article
Multidisciplinary Sciences
Achim Langenbucher, Nora Szentmary, Johannes Weisensee, Jascha Wendelstein, Alan Cayless, Rupert Menapace, Peter Hoffmann
Summary: The study analyzed corneal power using raytracing based on a large OCT dataset, and evaluated it with respect to different definitions of best focus. The findings suggest that a multivariate linear model enables more precise estimation of corneal power compared to traditional methods.
Article
Ophthalmology
Mi Yeon Song, Kyoung Hae Kang, Hun Lee, Tae-im Kim, Kyungmin Koh
Summary: This study assessed and compared the visual performance of two extended depth-of-focus intraocular lenses, Tecnis Symfony and Acrysof IQ Vivity. The results showed no significant difference between the two lenses in most measures, except for the near visual acuity at 33 cm, where the Symfony lens performed better. The Symfony lens also demonstrated a smoother defocus curve.
EYE & CONTACT LENS-SCIENCE AND CLINICAL PRACTICE
(2022)
Article
Ophthalmology
Irene Martinez-Alberquilla, Maria Garcia-Montero, Javier Ruiz-Alcocer, Almudena Crooke, David Madrid-Costa
Summary: After 15 days of wear, two contact lenses for presbyopia, one with extended depth-of focus design and one conventional multifocal lens, showed similar visual quality, preserved ocular surface integrity, and resulted in similar levels of dry eye symptoms for the patients.
CONTACT LENS & ANTERIOR EYE
(2021)
Article
Optics
Quan Sheng, Aihua Wang, Jingni Geng, Shijie Fu, Yuanyuan Ma, Wei Shi, Jianquan Yao, Takashige Omatsu, David Spence
Summary: In this study, ultra-high-order LG beams with m beyond 300 were generated using the spherical aberration of a lens in a simple end-pumped Nd:YVO4 laser at 1064 nm, providing a simple and flexible method to convert a wide range of lasers to generate ultra-high-order LG modes.
LASER & PHOTONICS REVIEWS
(2023)
Review
Ophthalmology
Elinor Megiddo-Barnir, Jorge L. Alio
Summary: In recent years, there has been a surge in the availability of different types of intraocular lenses (IOLs) for treating presbyopia. Extended depth-of-focus (EDOF) lenses aim to enhance the depth of focus and reduce visual disturbances like glare and halos. However, excessive aberrations can lead to decreased retinal image quality and blur. EDOF characteristics can be combined with multifocality or other optical designs, leading to confusion in the market. This article provides clarification on true EDOF lenses, categorizes different types based on optical principles, and reviews recent outcomes.
ASIA-PACIFIC JOURNAL OF OPHTHALMOLOGY
(2023)
Article
Optics
Lenny A. Romero, Andres G. Marrugo, Maria S. Millan
Summary: This article explores the possibility of extending the depth of focus of an imaging lens using an asymmetric quartic phase-mask, while keeping aberration within a relatively low level. The proposed method is suitable for ophthalmic applications, relying on the patient's neural adaptation to their own aberrations for clear imaging. The numerical and experimental results are validated.
Article
Biochemical Research Methods
Carmen M. Lago, Alberto De Castro, Clara Benedi-Garia, Sara Aissati, Susana Marcos
Summary: Adaptive optics (AO) visual simulators are excellent platforms for non-invasive simulation visual performance with new intraocular lens (IOL) designs. Researchers measured the through focus visual acuity in subjects with a new refractive IOL physically inserted in a cuvette and projected onto the eye's pupil. The IOL increased depth-of-focus (DOF) while maintaining high visual acuity.
BIOMEDICAL OPTICS EXPRESS
(2022)
Article
Chemistry, Multidisciplinary
Shaodong Zhou, Kelei Xi, Songlin Zhuang, Qingqing Cheng
Summary: This study introduces a terahertz metalens with spherical aberration correction that utilizes dynamic phase for polarization multiplexed imaging. The metalens shows high imaging efficiencies and extinction ratios, exceeding 50% and 10:1 respectively. It offers a new approach for achieving multifunctional beam steering, tomographic imaging, and chiroptical detection.
Article
Optics
Y. Long Qiang, Tristram J. Alexander, C. Martijn de Sterke
Summary: Encouraged by recent experimental breakthroughs, this study investigates the types of bright solitons that can exist in the presence of a Kerr nonlinearity and quadratic, quartic, and sextic dispersion by examining the nature of the soliton tails. The study verifies the soliton shape through numerical calculations and finds analytic solutions for certain parameters. The results reveal the sensitivity of the interaction dynamics to the specific choice of dispersion parameters, providing a framework for experiments in this regime and for exploring parameter spaces with even higher dimensions.
Article
Health Care Sciences & Services
In-Kyun Hahn, Donghan Lee, Dong-Ho Lee, Hun Lee, Hungwon Tchah, Jae-Yong Kim
Summary: This study aimed to investigate the changes in higher-order aberrations (HOAs) after wearing orthokeratology (OK) lenses in myopic patients. The results showed that wearing OK lenses significantly improved uncorrected visual acuity (UCVA), decreased spherical equivalent, and increased total HOAs and spherical aberration. Properly prescribed OK lens wear led to significantly improved UCVA, decreased myopic spherical equivalent, but increased total HOAs. The changes in spherical aberration were significantly positively correlated with the change in spherical equivalent.
JOURNAL OF PERSONALIZED MEDICINE
(2022)
Article
Medicine, General & Internal
Luis Salva, Scott Garcia, Salvador Garcia-Delpech, Anabel Martinez-Espert, Vicente Ferrando
Summary: The aim of this study was to evaluate the impact of different spherical aberration values on the optical performance of the FEMTIS Comfort intraocular lens. The results showed that increasingly negative spherical aberration values made the lens more bifocal, moderating its extended-depth-of-focus characteristic. Conversely, higher positive spherical aberration values shifted the through-focus modulation transfer function curve towards positive vergences, leading to worsened distance vision in the +1.00 to +2.00 D range, but improved vision in the +0.50 D to +1.00 D range. Therefore, assessing spherical aberration in patients before implanting asymmetric intraocular lenses is necessary for predicting outcomes and making informed decisions based on patients' visual requirements.
JOURNAL OF CLINICAL MEDICINE
(2023)
Article
Ophthalmology
Renfeng Xu, Pete Kollbaum, Larry Thibos, Norberto Lopez-Gil, Arthur Bradley
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2018)
Article
Ophthalmology
Paula Bernal-Molina, Ivan Marin-Franch, Antonio J. Del Aguila-Carrasco, Jose J. Esteve-Taboada, Norberto Lopez-Gil, Philip B. Kruger, Robert Montes-Mico
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2017)
Article
Optics
Larry N. Thibos, Norberto Lopez-Gil, Arthur Bradley
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2018)
Article
Ophthalmology
Juan F. Zapata-Diaz, Ivan Marin-Franch, Hema Radhakrishnan, Norberto Lopez-Gil
Article
Optics
Maciej M. Bartuzel, D. Robert Iskander, Ivan Marin-Franch, Norberto Lopez-Gil
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2019)
Article
Optics
Larry N. Thibos, Arthur Bradley, Renfeng Xu, Norberto Lopez-Gil
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2019)
Article
Optics
Renfeng Xu, Larry N. Thibos, Norberto Lopez-Gil, Pete Kollbaum, Arthur Bradley
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2019)
Review
Ophthalmology
Antonio J. Del Aguila-Carrasco, Philip B. Kruger, Francisco Lara, Norberto Lopez-Gil
CLINICAL AND EXPERIMENTAL OPTOMETRY
(2020)
Article
Ophthalmology
Rosa Maria Salmeron-Campillo, Mateusz Jaskulski, Sergio Lara-Canovas, Jose Manuel Gonzalez-Meijome, Norberto Lopez-Gil
JOURNAL OF OPHTHALMOLOGY
(2019)
Article
Ophthalmology
Francisco Lara, Antonio J. Del Aguila-Carrasco, Ivan Marin-Franch, Resurreccion Riquelme-Nicolas, Norberto Lopez-Gil
OPTOMETRY AND VISION SCIENCE
(2020)
Article
Ophthalmology
Juan F. Zapata-Diaz, Miguel A. Rodriguez-Izquierdo, Nassima Ould-Amer, Jeronimo Lajara-Blesa, Norberto Lopez-Gil
JOURNAL OF REFRACTIVE SURGERY
(2020)
Article
Ophthalmology
Francisco Lara-Lacarcel, Ivan Marin-Franch, Vicente Fernandez-Sanchez, Resurreccion Riquelme-Nicolas, Norberto Lopez-Gil
Summary: The study found that there are small changes in both the power and axis of astigmatism during accommodation, especially when convergence is involved. These changes in astigmatism may be attributed to shifts in the position of the crystalline lens during accommodation.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2021)
Article
Ophthalmology
Juan F. Zapata-Diaz, Hema Radhakrishnan, W. Neil Charman, Norberto Lopez-Gil
JOURNAL OF OPTOMETRY
(2019)
Article
Ophthalmology
Antonio J. Del Aguila-Carrasco, Francisco Lara, Paula Bernal-Molina, Resurreccion Riquelme-Nicolas, Ivan Marin-Franch, Jose J. Esteve-Taboada, Robert Montes-Mico, Philip B. Kruger, Norberto Lopez-Gil
JOURNAL OF OPTOMETRY
(2019)
Article
Ophthalmology
Ivan Marin-Franch, Renfeng Xu, Arthur Bradley, Larry N. Thibos, Norberto Lopez-Gil
JOURNAL OF OPTOMETRY
(2018)
Article
Neurosciences
Ryan P. Silk, Hanagh R. Winter, Ouria Dkhissi-Benyahya, Carmella Evans -Molina, Alan W. Stitt, Vijay K. Tiwari, David A. Simpson, Eleni Beli
Summary: This study investigates whether diabetes affects the daily rhythm of gene expression in the retina. The results show that diabetic mice exhibited phase advancement in the expression of certain genes compared to non-diabetic mice. The study also identified oxygen-sensing mechanisms and HIF1alpha as potential upstream regulators. These findings provide important insights into the development of diabetic retinopathy.
Article
Neurosciences
Krishnamachari S. Prahalad, Daniel R. Coates
Summary: Visual stimuli presented around the time of a saccade can be perceived differently by the visual system, including a reduction in the harmful impact of flankers. This study investigated the effects of microsaccades on crowded stimuli placed 20 arc minutes from the center of gaze. The findings suggest two separate pre-saccadic benefits, one that regularizes the crowding zone and another that specifically benefits microsaccade targets surrounded by tangential flankers.
Article
Neurosciences
Chandrika Ravisankar, Christopher W. Tyler, Clifton M. Schor, Shrikant R. Bharadwaj
Summary: This study revealed that less than one-third of adults with normal binocular vision were able to successfully free-fuse random-dot image pairs and identify the embedded stereoscopic shapes. The successful participants showed a dissociation of vergence and accommodative responses, while the unsuccessful ones either exhibited strong vergence and accommodation or weak vergence and strong accommodation. Task performance of the unsuccessful cluster improved significantly with pharmacological paralysis of accommodation. A minority of participants also learned to dissociate one direction of their vergence and accommodation crosslinks with repeated free-fusion trials, optimizing their task performance.