Results 21 to 30 of about 12,483 (262)

Effect of accommodation on peripheral ocular aberrations

Journal of Vision, 2009
Changes in peripheral aberrations, particularly higher order aberrations, as a function of accommodation have received little attention. Wavefront aberrations were measured for the right eyes of 9 young adult emmetropes at 38 field positions in the central 42 x 32 degrees of the visual field. Subjects accommodated monocularly to targets at vergences of
Ankit, Mathur, David A, Atchison, W Neil, Charman   +2 more
openaire   +2 more sources

Dynamic accommodation measurement using Purkinje reflections and machine learning

Scientific Reports, 2023
Quantifying eye movement is important for diagnosing various neurological and ocular diseases as well as AR/VR displays. We developed a simple setup for real-time dynamic gaze tracking and accommodation measurements based on Purkinje reflections, which ...
Faik Ozan Ozhan, Ugur Aygun, Afsun Sahin, Hakan Urey   +3 more
doaj   +1 more source

Influence of orthokeratology lenses on the state of accommodative function in children with myopia

Zaporožskij Medicinskij Žurnal, 2014
Aim. It was showed that optimal optical correction have positive effect on the accommodative apparatus of the myopic eye. Absolute and relative accommodation reserves, the nearest point of clear vision in 50 patients (100 eyes) with mild myopia was ...
T. E. Tsybulskaya
doaj   +1 more source

Imaging Quality and Fatigue Quantification of Ocular Optical System

IEEE Access, 2020
Human eye is a special kind of optical system, and its imaging quality and fatigue level seem susceptible to the illumination. In this study we were sought to develop a novel method to quantify ocular fatigue more accurately, and to assess the influence ...
Jianqi Cai, Wentao Hao, Shanshan Zeng, Ya Guo, Rongrong Wen   +4 more
doaj   +1 more source

Does methylphenidate treatment affect functional and structural ocular parameters in patients with attention deficit hyperactivity disorder? - A prospective, one year follow-up study

Indian Journal of Ophthalmology, 2022
Purpose: Methylphenidate hydrochloride, which blocks the reuptake mechanisms of dopamine and norepinephrine, is used in attention deficit hyperactivity disorder (ADHD) treatment. Methylphenidate has many general side effects including ocular findings. In
Pınar Bingöl-Kızıltunç, Esra Yürümez, Huban Atilla   +2 more
doaj   +1 more source

Acceleration characteristics of human ocular accommodation

Vision Research, 2005
Position and velocity of accommodation are known to increase with stimulus magnitude, however, little is known about acceleration properties. We investigated three acceleration properties: peak acceleration, time-to-peak acceleration and total duration of acceleration to step changes in defocus.
Bharadwaj, Shrikant R., Schor, Clifton M.   +1 more
openaire   +2 more sources

Age-Related changes in ocular aberrations with accommodation

Journal of Vision, 2007
This study investigates the changes in aberrations with monocular accommodation as a function of age. Second-order and higher order wavefront aberrations and pupil size were measured as a function of accommodation demand over the range of 0-4 D in the right eyes of 47 normal subjects with ages between 17 and 56 years.
Radhakrishnan, Hema; id_orcid 0000-0002-8898-2453, Charman, W. Neil   +1 more
openaire   +4 more sources

Sustained Therapeutic Efficacy of Intravenous Plasminogen Concentrate in Pediatric Patients With Type 1 Plasminogen Deficiency: An Analysis of Dosing Parameters and Clinical Outcomes

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Type 1 plasminogen deficiency (PLGD‐1) is an ultra‐rare autosomal recessive disorder caused by variants in the PLG gene and affects approximately 1.6 individuals per million. The condition is characterized by decreased plasminogen levels and impaired function, resulting in fibrin‐rich lesions on mucous membranes throughout the body.
Charles Nakar, Karen Thibaudeau, Mary Mathias, Heather McDaniel, Madlen Reschke, Klaus Tenbrock, Joseph M. Parker, Amy Shapiro   +7 more
wiley   +1 more source

Statistical Model of Ocular Wavefronts With Accommodation

Investigative Ophthalmology & Visual Science
The purpose of this study was to determine the minimum number of orthonormal basis functions, applying Principal Component Analysis (PCA), to represent the most wavefront aberrations at different accommodation stages. The study also aims to generate synthetic wavefront data using these functions.Monocular wavefront data from 191 subjects (26.15 ± 5.56 ...
Mechó-García, María, Arcas-Carbonell, María, Orduna-Hospital, Elvira, Sánchez-Cano, Ana, López-Gil, Norberto, Macedo-de-Araújo, Rute J., Faria-Ribeiro, Miguel, Fernandes, Paulo, González-Méijome, José Manuel, Rozema, Jos   +9 more
openaire   +6 more sources

Guidelines for Pediatric Radiotherapy Simulation: A Report From the Children's Oncology Group Radiation Oncology Discipline

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric radiation therapy presents unique challenges compared to adult treatments, including those of immobilization, potential need for sedation, and the critical importance of accurate, reproducible positioning. Additionally, heightened attention to imaging doses is necessary to minimize long‐term toxicity in survivors.
Parham Alaei, Stephen Mihalcik, Sujith Baliga, Young Kwok, Dana Casey, Eric Ehler, Christiane Burton, John C. Breneman, Daphne A. Haas‐Kogan, Suzanne L. Wolden, Arnold C. Paulino, Nadia N. Laack, Natia Esiashvili, Sarah Milgrom, Christine Hill‐Kayser, Thomas J. Fitzgerald, John A. Kalapurakal, Chia‐Ho Hua   +17 more
wiley   +1 more source