Results 41 to 50 of about 420,660 (342)

Real-time measurement of ocular wavefront aberrations in symptomatic subjects [PDF]

, 2018
Te purpose of this work was to study the real-time changes of the optical properties of the eye with accommodation in subjects with symptoms of accommodative disorders.
Franco, Sandra, Gomes, Jessica
core   +2 more sources

Objective Amplitude of Accommodation Computed from Optical Quality Metrics Applied to Wavefront Outcomes

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, Vicente Fernández-Sánchez, Larry N. Thibos, Robert Montés-Micó   +3 more
doaj   +1 more source

Changes in ocular biometry during short‐term accommodation in children

Ophthalmic & physiological optics, 2020
Near work has been linked with myopia development; however, the underlying mechanism remains unclear. Small increases in axial length during accommodation have previously been reported in adults, and therefore, this study aimed to examine if ...
Rohan P J Hughes, S. Read, M. Collins, Stephen J. Vincent   +3 more
semanticscholar   +1 more source

Does the Badal optometer stimulate accommodation accurately? [PDF]

, 2016
Postprint (author's final ...
Aldaba Arévalo, Mikel, Atchison, David A., Otero Molins, Carles, Pujol Ramo, Jaume   +3 more
core   +2 more sources

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

Factors Influencing Pseudo-Accommodation—The Difference between Subjectively Reported Range of Clear Focus and Objectively Measured Accommodation Range

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, Amy L. Sheppard, Tom Drew, Toshifumi Mihashi, Juan F. Zapata-Díaz, Hema Radhakrishnan, D. Robert Iskander, James S. Wolffsohn   +7 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

A retinoscopic survey of 333 horses and ponies in the UK [PDF]

, 2014
Introduction: Ophthalmic examination in the horse is generally limited to crude assessment of vision and screening for ocular lesions. The refractive state of equine eyes and the potential impact on vision and performance requires further ...
Chung, Coile, Corboy, Davidson, Duval, Evans, Flitcroft, Gaiddon, Gordon, Graham, Grinninger, Harman, Howlett, Kinney, McClatchey, McMullen, Michau, Miller, Murphy, Murphy, Mutti, Norton, Ofri, Owens, Rose, Rosenfield, Rull-Cotrina, Saunders, Sekuler, Sivak, Smith, Svaldenienė, Timney, Weale, Wong, Wright, Young, Young, Zadnik   +38 more
core   +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, Yuwen Wang, Xinping Yu, Aiqin Xu, Jian Jiang, Hao Chen   +5 more
doaj   +1 more source

Proteomic analysis of the bovine and human ciliary zonule [PDF]

, 2016
PURPOSE: The zonule of Zinn (ciliary zonule) is a system of fibers that centers the crystalline lens on the optical axis of the eye. Mutations in zonule components underlie syndromic conditions associated with a broad range of ocular pathologies ...
Bassnett, Steven, David, Larry L, De Maria, Alicia, Wilmarth, Phillip A   +3 more
core   +2 more sources