Results 21 to 30 of about 314,600 (296)

Changes of ocular aberration with accommodation

American Journal of Ophthalmology, 2002
To study the effect of accommodation on ocular aberrations.Observational case series.The ocular aberrations in 33 eyes of 33 young adults were measured with a Hartmann-Shack wavefront aberrometer before and during 3 diopters of accommodation.The root mean square values of wavefront error did not change for a 4-mm and a 6-mm zone; however, spherical ...
Sayuri Ninomiya, Takashi Fujikado, Teruhito Kuroda, Naoyuki Maeda, Yasuo Tano, Tetsuro Oshika, Yoko Hirohara, Toshifumi Mihashi   +7 more
openaire   +3 more sources

Mechanism of accommodation: A review of theoretical propositions

African Vision and Eye Health, 2015
Accommodation is the process by which the human eye changes its focus to see objects at varying distances from the eye. For nearly 300 years, scientists have investigated and presented various views on the mechanism of accommodation.
Godwin O. Ovenseri-Ogbomo, Olalekan A. Oduntan   +1 more
doaj   +1 more source

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

Epidemiological study of ocular trauma in an urban slum population in Delhi, India. [PDF]

, 2008
PURPOSE: To study the epidemiology and clinical profile of victims of ocular trauma in an urban slum population. MATERIALS AND METHODS: This cross-sectional study, conducted on 500 families each in three randomly selected urban slums in Delhi, collected ...
Vats, S, Gupta, SK, Vashist, P, Chandra, M, Gogoi, M, Murthy, GVS   +5 more
core   +1 more source

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

Visual discomfort and blur [PDF]

, 2013
This work was supported by a doctoral training grant from the BBSRC to LOH.Certain visual stimuli, such as striped patterns and filtered noise, have been reported to be uncomfortable.
Hibbard, Paul Barry, O'Hare, L, O'Hare, Louise, Hibbard, PB   +3 more
core   +1 more source

Peer-to-Peer Accommodation Networks [PDF]

, 2017
Peer-to-Peer Accommodation Networks: Pushing the boundaries is the first book to provide an in-depth analysis of the business model of Airbnb, to discuss factors facilitating the transition of peer-to-peer networks from niche market to mainstream ...
Dolnicar, Sara
core   +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

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, Ebrahim Jafarzadehpur, Ali Mirzajani, Mohsen Nematy   +3 more
doaj   +3 more sources

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