Results 21 to 30 of about 333,652 (293)
A geometric model of ocular accommodation
Vision Research, 2010 An exoteric geometric mechanics model of ocular accommodation is detailed to elucidate the main ideas of various ongoing modeling efforts. The present study derives solutions for the stretched state of the ocular lens as it might appear during accommodation by using simple geometric arguments and a volume constraint, rather than the more mathematically
Reilly, Matthew A., Ravi, Nathan
openaire +2 more sources
Numerical modelling of ocular accommodation process [PDF]
, 2014 The ocular accommodation mechanism, as the main apparatus in the eye responsible for maintaining required vision quality when looking at objects at various distances to the eye, is one of the most vital mechanisms of the eye.
Mohammad Pour, Hooman
core +1 more source
Evaluation of ocular accommodation, convergence and fusional vergence changes during Ramadan [PDF]
Journal of Fasting and Health, 2013 Purpose: There are a few researches regarding the effects of Islamic fasting on visual system. The aim of this study was to investigate the effects of Ramadan fasting on the amplitude of accommodation (AA), near point of convergence (NPC), positive and ...
Seyed Hosein Hoseini-Yazdi +3 more
doaj +5 more sources
Journal of Optometry, 2009 Purpose: We studied the accuracy and precision of 32 objective wavefront methods for finding the amplitude of accommodation obtained in 180 eyes. Methods: Ocular accommodation was stimulated with 0.5 D steps in target vergence spanning the full range of ...
Norberto López-Gil +3 more
doaj +1 more source
Vision, 2019 The key determinants of the range of clear focus in pre-presbyopes and their relative contributions to the difference between subjective range of focus and objective accommodation assessments have not been previously quantified.
Sandeep K. Dhallu +7 more
doaj +1 more source
Can we always rely on Borish delayed test for latent hypermetropia?
Indian Journal of Ophthalmology. Case Reports, 2023 The term hyperopia refers to a refractive condition of the eye where parallel light rays from infinity focus behind the neurosensory retina, after refraction through the ocular media when accommodation is at rest.
Devanshi M Dalal, Shivani Mishra
doaj +1 more source
Effect of Illumination on Ocular Status Modifications Induced by Short-Term 3D TV Viewing
Neural Plasticity, 2017 Objectives. This study aimed to compare changes in ocular status after 3D TV viewing under three modes of illumination and thereby identify optimal illumination for 3D TV viewing. Methods.
Yuanyuan Chen +5 more
doaj +1 more source
The influence of downward gaze and accommodation on ocular aberrations over time
, 2011 *This article is free to read on the publisher's website*\ud \ud A Shack–Hartmann wavefront sensor was modified to allow measurement of ocular aberrations in downward gaze with binocular fixation.
Collins, Michael +9 more
core +1 more source
, 2017 Ocular accommodation describes the neuromuscular process that allows the eye to focus clearly objects located at distances from infinity to a near point determined by the amplitude of accommodation and is a reflex response that appears to occur ...
Gray, Lyle S., Winn, Barry
core +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 +4 more
doaj +1 more source