Article
Multidisciplinary Sciences
Sohee Jeon, Ayoung Choi, Hyunggoo Kwon
Summary: The newly developed extended-depth-of-focus AcrySof((R)) Vivity (TM) intraocular lens (IOL) shows promise in minimizing dysphotopsia, but has limitations in uncorrected near visual acuity (UNVA). A study found that pupil size is significantly associated with UNVA, suggesting that eyes with smaller pupils may benefit from UNVA.
Article
Ophthalmology
Chenglu Ding, Yunyun Chen, Xue Li, Yingying Huang, Hao Chen, Jinhua Bao
Summary: Increased higher-order aberrations and improved accommodative accuracy were observed during orthokeratology treatment, but began to regress after the cessation of orthokeratology. A significant positive correlation between improved accommodative accuracy and slowed axial elongation was only observed during the first 6 months of treatment.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2022)
Article
Biochemical Research Methods
Dmitry Romashchenko, Petros Papadogiannis, Peter Unsbo, Linda Lundstrom
Summary: The study used a new dual-angle open-field sensor to assess the difference in peripheral retinal image quality between myopic and emmetropic eyes. The results showed that myopic eyes exhibited myopic shifts under accommodation, while emmetropic eyes did not show any changes.
BIOMEDICAL OPTICS EXPRESS
(2021)
Review
Neurosciences
Praveen K. Bandela, Shrikant R. Bharadwaj, Arthur Ho, Eric Papas
Summary: This review summarizes the research findings on accommodative responses in humans over the past 70 years, identifying multiple retinotopic cues that may contribute to solving the problem of retinal defocus. However, these studies have methodological and measurement issues, suggesting the use of Bayesian statistical cue-combination approach to address this problem.
Article
Optics
Yunfeng Nie, David R. Shafer, Heidi Ottevaere, Hugo Thienpont, Fabian Duerr
Summary: Freeform optics has been widely used in reflective designs for broad-wavelength imaging applications due to its compactness and high performance. A differentiable ray tracing approach and an automated freeform design framework have been introduced for most optical surfaces, allowing for the generation of feasible starting points quickly and enabling compact, high-performing designs through a double-pass surface strategy.
Article
Biochemical Research Methods
Charles-Edouard Leroux, Conor Leahy, Christophe Fontvieille, Fabrice Bardin
Summary: The focusing distance of the eye fluctuates during accommodation, presenting a longstanding challenge in visual science. This study aims to develop a statistical approach to accurately describe and simulate these fluctuations for use in future experiments. The random walk approach is utilized to model the dynamics of accommodation fluctuations.
BIOMEDICAL OPTICS EXPRESS
(2021)
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
Optics
Jose Sasian, Weichuan Gao
Summary: The characteristics of linear astigmatism in a nonaxially symmetric optical system are examined, with a reexamination of the conventional interpretation using P and N focal surfaces. A perspective using field curves is provided to explain and visualize the behavior of linear astigmatism. Methods of controlling linear astigmatism, including pupil imaging ray tracing, and confocal mirror designs free from linear astigmatism, are discussed.
OPTICAL ENGINEERING
(2021)
Article
Optics
Maria Mecho-Garcia, Inaki Blanco-Martinez, Paulo Fernandes, Rute J. Macedo-de-Araujo, Miguel Faria-Ribeiro, Jose Manuel Gonzalez-Meijome
Summary: This study aimed to investigate the effect of pupil dilation with Phenylephrine Hydrochloride (PHCl) on the accommodative response and Zernike coefficient magnitude. Results showed statistically significant differences in the Zernike coefficients C-3(-1), C-3(1), C-4(0), and C-6(0) between natural conditions and after pupil dilation with PHCl.
Article
Ophthalmology
Raman Prasad Sah, Matt Jaskulski, Pete S. Kollbaum
Summary: This study developed an optical model of a child's eye to investigate the impact of target distance and accommodative behavior on retinal image quality with multi-zone lenses. The results showed that adjusting spherical aberration and pupil radius resulted in wider defocus distributions at closer viewing distances. Additionally, accommodative lag had little effect on the legibility of typical text.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2022)
Article
Ophthalmology
Merve Beyza Yildiz, Elvin Yildiz, Sevcan Balci, Buse Rahime Hasirci Bayir, Yilmaz Cetinkaya
Summary: The study evaluated pupil size, accommodation, and ocular higher-order aberrations (HOAs) in migraine patients during attacks, showing reduced pupil size and increased accommodative response, with no significant changes in HOAs. Additionally, no significant differences were found between symptomatic and non-symptomatic sides in unilateral headache patients.
EUROPEAN JOURNAL OF OPHTHALMOLOGY
(2021)
Article
Biochemical Research Methods
Rohan P. J. Hughes, Scott A. Read, Michael J. Collins, Stephen J. Vincent
Summary: This study examined anterior corneal, internal ocular, and total ocular higher order aberrations (HOA's), and retinal image quality in a non-myopic, paediatric cohort. The study found that internal ocular HOA's were higher in magnitude but partially compensated, resulting in reduced levels of HOA's and excellent retinal image quality. Weak correlations were observed between HOA's and age, sex, refractive error, and axial length. These findings provide an improved understanding of the optics and retinal image quality of children's eyes.
BIOMEDICAL OPTICS EXPRESS
(2023)
Article
Ophthalmology
Maximilian Hammer, Yvonne Heggemann, Gerd U. Auffarth
Summary: This study introduces a dynamic stimulation aberrometry (DSA) method for measuring binocular accommodation and compares it with subjective push-up method and historical results of Duane. The results show that DSA method can objectively measure binocular accommodation, which decreases with age; dynamic parameters such as time delay of the commencement of accommodation after near target presentation increase with age; DSA method records dynamic changes in pupil motility and wavefront simultaneously. This method can be applied in large-scale studies and serve as a control for further research.
OPHTHALMOLOGY SCIENCE
(2023)
Article
Biochemical Research Methods
Hamed Haidari, Victor Erhartunian, Samuel Arba-Mosquera
Summary: A simple and novel method has been developed to analyze the centration of a lenticule of tissue extracted from a cornea. The method uses the center of mass of the individual differences between post and preoperative maps to determine the lenticule centration, while the spatial distance to a reference point determines the decentration.
BIOMEDICAL OPTICS EXPRESS
(2023)
Review
Computer Science, Information Systems
Swathi Gowroju, Aarti, Sandeep Kumar
Summary: Iris recognition is a secure and widely used biometric application in the digital world, with researchers focusing on improving its speed and accuracy. This paper summarizes the techniques and algorithms used by researchers to predict human age using iris recognition, and discusses the evaluation parameters and databases used in this field. The strengths, weaknesses, and scope of improvement for state-of-the-art algorithms are also presented.
MULTIMEDIA TOOLS AND APPLICATIONS
(2022)