Results 261 to 270 of about 48,579 (308)
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Annals of Otology, Rhinology & Laryngology, 1973
The effects of ocular fixation on normal and pathological nystagmus are reviewed, and in particular the effect of opening the eyes during the caloric test is analyzed. The Ocular Fixation Index of Demanez was applied to the records of 100 patients, and the findings tend to confirm the usefulness of this Index as a means of distinguishing peripheral ...
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The effects of ocular fixation on normal and pathological nystagmus are reviewed, and in particular the effect of opening the eyes during the caloric test is analyzed. The Ocular Fixation Index of Demanez was applied to the records of 100 patients, and the findings tend to confirm the usefulness of this Index as a means of distinguishing peripheral ...
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Ocular Fixation Abnormality in Patients with Autism Spectrum Disorder
Journal of Autism and Developmental Disorders, 2016We examined the factors that influence ocular fixation control in adults with autism spectrum disorder (ASD) including sensory information, individuals' motor characteristics, and inhibitory control. The ASD group showed difficulty in maintaining fixation especially when there was no fixation target.
Aya, Shirama +3 more
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Infant responses of ocular fixation to moving visual stimuli
Journal of Experimental Child Psychology, 1976Abstract Infants of 1, 2, and 3 months of age were presented with two checkerboard patterns, one stationary and the other moving in a horizontal oscillatory motion at one of eight rates. An observer who could see only the infant's head and eyes recorded, for each 30-sec trial, (a) the position of first fixation, (b) position of fixation at the end of
F C, Volkmann, M V, Dobson
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Effects of Six Conditions of Ocular Fixation on Caloric Nystagmus
Archives of Otolaryngology - Head and Neck Surgery, 1980Caloric tests were performed on 20 normal volunteers under the following six conditions of ocular fixation: (1) eyes open with lighted +20-diopter lenses; (2) eyes open with lighted +20-diopter lenses plus strobe lighting; (3) eyes open in darkness; (4) eyes closed in darkness; (5) eyes closed in a dimly lighted room; and (6) eyes open with unlighted ...
E A, Karlsen +2 more
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1. Effect of Different Conditions of Ocular Fixation
Annals of Otology, Rhinology & Laryngology, 1977Twelve normal subjects received standard caloric testing under the following conditions: 1) fixation, 2) Frenzel glasses in a dimly lit room, 3) eyes open in total darkness, and 4) eyes closed. Multiple nystagmus response parameters were evaluated and statistically compared for each condition. Fixation markedly diminished induced nystagmus and produced
Robert W. Baloh +3 more
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Binocular Coordination, Fixation Disparity, and Ocular Dominance
Perception, 1996In a series of experiments we have quantified the spatial and temporal dynamics of binocular coordination. Tasks studied ranged from simple scanning and letter detection to complex visual processing in text reading. In all of these paradigms we found similar eye movement characteristics: in 70% to 90% of the observations, the ...
R Radach +3 more
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Ocular translation and cyclotorsion due to changes in fixation distance
Vision Research, 1980Abstract When an observer, looking straight ahead with one eye occluded, aligns a nearby target with a more distant one, and then alternately fixates upon the near and far targets, the iris and pupil of the viewing eye shift back and forth laterally by as much as 200 μm, and produce fixation-dependent misalignment of the targets.
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Failure of Fixation Suppression of Caloric Nystagmus and Ocular Motor Abnormalities
Archives of Neurology, 1980Caloric nystagmus is substantially suppressed by visual fixation. The degree of suppression of caloric nystagmus is influenced by the condition of visual fixation. We studied the percent reduction in slow-phase velocity of caloric nystagmus by visual fixation and certain abnormalities in optokinetic nystagmus, smooth pursuit, and maintenance of ocular ...
Y, Sato +4 more
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Fixational ocular motor control is plastic despite visual deprivation
Visual Neuroscience, 2002The aim of this study was to assess the plasticity of human voluntary fixational eye movement control in relation to visual experience/chronic visual deprivation. Twelve blind adults participated (self-reported vision ≤ light perception in each eye; age range = 23–56 years; visual experience range = 0–28 years; blindness duration range = 6–55 ...
E C, Hall, K J, Ciuffreda
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Ocular fixation and visual activity in the monkey lateral intraparietal area
Experimental Brain Research, 2002The macaque lateral intraparietal area (LIP) has been implicated in visuospatial attention and saccade planning. Since area LIP also contains a representation of the central visual field, we investigated its possible role in fixation and foveal attention in a visual fixation task with gap (momentary disappearance of fixation point).
S, Ben Hamed, J-R, Duhamel
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