Results 11 to 20 of about 12,598 (296)

Surfaces of forced vergence disparity [PDF]

open access: yesAfrican Vision and Eye Health, 2013
Purpose: To introduce the concept of surfaces offorced vergence disparity using measurementsof fixation disparity from three young, healthy individuals. Method: Fixation disparities were measured in three individuals in relation to variation in stimulus
A. Rubin
doaj   +2 more sources

A review of non-strabismic accommodative-vergence anomalies in school-age children. Part 1: Vergence anomalies [PDF]

open access: yesAfrican Vision and Eye Health, 2015
Comfortable reading and the performance of near point activities involve efficient accommodative and vergence systems. However, accommodative and vergence anomalies are associated with various symptoms that impair efficient near point tasks.
Samuel O. Wajuihian, Rekha Hansraj
doaj   +2 more sources

Gaze-dependent phoria and vergence adaptation [PDF]

open access: yes, 2016
Incomitance is a condition with gaze-dependent deviations of ocular alignment and is common in strabismus patients. The physiological mechanisms that maintain equal horizontal ocular alignment in all gaze directions (concomitance) in healthy individuals ...
Dysli, Muriel   +2 more
core   +5 more sources

Atypical cognitive vergence responses in children with attention deficit hyperactivity disorder but not with autism spectrum disorder in a facial emotion recognition task

open access: yesPsychiatry Research Communications, 2022
Background: Facial expression of emotion is fundamental to human social interactions. Attention to relevant cues in ADHD and ASD patients are believed to underlie difficulties in recognizing emotions. Cognitive vergence eye movements during gaze fixation
Patricia Bustos-Valenzuela   +6 more
doaj   +1 more source

Accuracy of formulae for secondary intraocular lens power calculations in pediatric aphakia

open access: yesJournal of Current Ophthalmology, 2017
Purpose: To compare the accuracy of axial length vergence formulas versus refractive vergence formulas for secondary intraocular lens (IOL) implantation in pediatric aphakia. Methods: This retrospective comparative study, evaluated 31 eyes of 31 patients
Fouad R. Nakhli   +2 more
doaj   +1 more source

Benefits from vergence rehabilitation: evidence for improvement of reading saccades and fixations

open access: yesFrontiers in Integrative Neuroscience, 2016
We hypothesize that binocular coordination of saccades is based on continuous neuroplasticity involving interactions of saccades and vergence. To test this hypothesis we study reading saccades in young students who were diagnosed for vergence disorders ...
François Daniel   +4 more
doaj   +1 more source

Differentiation between vergence and saccadic functional activity within the human frontal eye fields and midbrain revealed through fMRI. [PDF]

open access: yesPLoS ONE, 2011
Eye movement research has traditionally studied solely saccade and/or vergence eye movements by isolating these systems within a laboratory setting. While the neural correlates of saccadic eye movements are established, few studies have quantified the ...
Yelda Alkan   +2 more
doaj   +1 more source

A role of eye vergence in covert attention. [PDF]

open access: yesPLoS ONE, 2013
Covert spatial attention produces biases in perceptual and neural responses in the absence of overt orienting movements. The neural mechanism that gives rise to these effects is poorly understood.
Maria Solé Puig   +3 more
doaj   +1 more source

A Pilot Study of Disparity Vergence and Near Dissociated Phoria in Convergence Insufficiency Patients Before versus After Vergence Therapy

open access: yesFrontiers in Human Neuroscience, 2015
PURPOSE: This study examined the relationship between the near dissociated phoria and disparity vergence eye movements. Convergence insufficiency (CI) patients before vergence therapy were compared to: 1) the same patients after vergence therapy and 2 ...
Tara L. Alvarez
doaj   +1 more source

Bidirectional Synergistic Vergence [PDF]

open access: yesNeuro-Ophthalmology, 2015
A 14-year-old boy presented with left ptosis and squint since his childhood. In primary position he had left hypotropia with ptosis (levator function 2 mm). With elevation of the right eye, the left eye depresses and adducts; with depression of the right eye, the left eye elevates and abducts. Forced duction test revealed no restrictive pattern.
Gokcen, Gokce   +5 more
openaire   +2 more sources

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