Results 51 to 60 of about 10,330 (198)

Visual efficiency among teenaged athletes and non-athletes [PDF]

International Journal of Ophthalmology, 2017
AIM: To compare visual efficiency, specifically accom-modation, vergence, and oculomotor functions among athletes and non-athletes. METHODS: A cross-sectional study on sports vision screening was used to evaluate the visual skills of 214 elementary ...
Rokiah Omar, Yau Meng Kuan, Nurul Atikah Zuhairi, Faudziah Abd Manan, Victor Feizal Knight   +4 more
doaj   +1 more source

Describing ocular aberrations with wavefront vergence maps\ud

, 2009
A common optometric problem is to specify the eye’s ocular aberrations in terms of Zernike coefficients and to reduce that specification to a prescription for the optimum\ud sphero-cylindrical correcting lens. The typical approach is first to reconstruct
Nam, Jayoung, Larry N Thibos, Jayoung Nam, D Robert Iskander, Iskander, D. Robert, Thibos, Larry N.   +5 more
core   +1 more source

The Impact on Vergence Parameters After Smartphone Gaming

British and Irish Orthoptic Journal
Aims: To evaluate the impact of smartphone gaming on the vergence system of the eye. Settings and Design: A 5-month (from March 2023 to August 2023) comparative and experimental research was conducted.
Vishal Biswas, Roshni Majumder
doaj   +1 more source

Oculomotor responses and 3D displays [PDF]

, 1998
This thesis investigated some of the eye movement factors related to the development and use of eye pointing devices with three dimensional displays (stereoscopic and linear perspective).
Fulford, Katy A.
core  

Neural control of vergence eye movements: neurons encoding vergence velocity

, 1986
Single-unit recordings were made from midbrain areas in monkeys trained to make both conjugate and disjunctive (vergence) eye movements. Previous work had identified cells with a firing rate proportional to the vergence angle, without regard to the ...
C. A. Tello, L. E. Mays, P. D. Gamlin, J. D. Porter   +3 more
core   +1 more source

Binocular coordination: Reading stereoscopic sentences in depth [PDF]

, 2012
The present study employs a stereoscopic manipulation to present sentences in three dimensions to subjects as they read for comprehension. Subjects read sentences with (a) no depth cues, (b) a monocular depth cue that implied the sentence loomed out of ...
Blythe, Hazel I., Nicolas S. Holliman, Liversedge Simon P., Kirkby, Julie A., Keith Rayner, Hazel I Blythe, Rayner, K., Kirkby, J.A., Nicolas S Holliman, Kirkby Julie A., Kirkby, Julie, Holliman, N.S., Blythe Hazel I., Julie A Kirkby, Rayner Keith, Liversedge, Simon P., Holliman Nicolas S., Simon P. Liversedge, Liversedge, S.P., Elizabeth R Schotter, Blythe, H.I., Simon P Liversedge, Julie A. Kirkby, Elizabeth R. Schotter, Liversedge, Simon Paul, Schotter, E.R., Schotter Elizabeth R., Hazel I. Blythe   +27 more
core   +1 more source

Attention-Related Eye Vergence Measured in Children with Attention Deficit Hyperactivity Disorder.

PLoS ONE, 2015
Recent evidence shows a novel role for eye vergence in orienting attention in adult subjects. Here we investigated whether such modulation in eye vergence by attention is present in children and whether it is altered in children with ADHD compared to ...
Maria Solé Puig, Laura Pérez Zapata, Laura Puigcerver, Neus Esperalba Iglesias, Carmen Sanchez Garcia, August Romeo, Josep Cañete Crespillo, Hans Supèr   +7 more
doaj   +1 more source

Efferent compared to afferent neural substrates of the vergence eye movement system evoked via fMRI

Frontiers in Neuroscience
IntroductionThe vergence neural system was stimulated to dissect the afferent and efferent components of symmetrical vergence eye movement step responses.
Ayushi Sangoi, Farzin Hajebrahimi, Suril Gohel, Mitchell Scheiman, Tara L. Alvarez   +4 more
doaj   +1 more source

Evidence Supporting Open-Loop Control During Early Vergence

Journal of Eye Movement Research, 2013
Disparity vergence eye movements were analyzed to determine if the early component of this response operates under open-loop, or preprogrammed, control. The analysis compares ratios of peak velocity to response amplitude (i.e., main sequence ratios) for ...
John Semmlow, Tara Alvarez, Bérangère Granger-Donetti   +2 more
doaj   +1 more source

Target eccentricity and form influences disparity vergence eye movements responses: A temporal and dynamic analysis

Journal of Eye Movement Research, 2019
This study sought to investigate whether stimulation to the fovea or the parafovea with different color combinations influenced the temporal and dynamic features of 4° disparity vergence step responses.
Chang Yaramothu, Rajbir Jaswal, Tara Lynn Alvarez   +2 more
doaj   +1 more source