Results 261 to 270 of about 83,211 (286)
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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.
Robert W. Baloh +3 more
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Ocular fixation and macular integrity by microperimetry in multiple sclerosis
Graefe's Archive for Clinical and Experimental Ophthalmology, 2020To characterize the fixation and macular integrity of subjects with multiple sclerosis (MS) with and without previous optic neuritis (ON) using microperimetry (MP).Fifty-five eyes of MS patients, subdivided into three groups (28 eyes without ON, 16 with previous ON, and 11 eyes with previous ON in the contralateral eye), and 43 healthy eyes were ...
Amparo Gil-Casas +2 more
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Average double-pass ocular diattenuation using foveal fixation
Journal of Modern Optics, 2008The average amount of ocular diattenuation was studied using a double-pass polarimeter. This was directly computed from the central part of the elements of the first row of the Mueller matrix obtained from a series of 16 double-pass retinal images. For a 633 nm wavelength, the results show that the parameter is 0.10, on average.
Juan M. Bueno, Pablo Artal
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Localization of Static Positional Nystagmus With the Ocular Fixation Test
The Laryngoscope, 1999AbstractObjective: Characteristics of static positional nystagmus (SPN) (i.e., persistency, direction fixed, direction changing) are observed in both peripheral and central disturbances and possess no localizing value for vestibular lesions. Our objective was to investigate whether the ocular fixation test as applied to SPN could assist in localizing ...
R, Maire, B, Duvoisin
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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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Assessing inter-ocular fixational eye movements throughout the lifespan
Experimental Brain ResearchThis study aims to assess fixational eye movements (FEMs) obtained under binocular and monocular viewing in normal individuals across different age groups. We recruited 68 healthy participants divided into Group 1 (children, 3-9 years, n = 20), Group 2 (adolescents, 10-19 years, n = 26), and Group 3 (adults, 20-73 years, n = 22).
Sophie C, Yue +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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Ocular fixation index and mathematical models.
Acta oto-rhino-laryngologica Belgica, 1998Ocular fixation test and ocular fixation index (OFI) never have been interpreted in terms of mathematical models, despite their widespread diffusion. However, ocular fixation is a typical case of visual-vestibular interaction, and mathematical models have proven very helpful in interpreting some mechanisms of this interaction, e.g.
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Nystagmus and ocular fixation difficulties in learning-disabled children.
The American journal of occupational therapy : official publication of the American Occupational Therapy Association, 1980The visual fixation ability of learning-disabled children was evaluated after sensory integrative therapy had been administered for short or long periods of time. Children with hyporesponsive postrotary nystagmus displayed reduced oculomotor control skills, but the deficit was apparent only in those who had been in therapy for a shorter interval. These
K, Ottenbacher +3 more
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An ocular fixation device for freehand pars plana vitrectomy.
Modern problems in ophthalmology, 1977An adaptation of the stereotaxic micromanipulator is described which provides ocular support and stabilization during freehand vitrectomy. It consists of a baseplate for immobilization of the patient's head and an ocular fixation arm assembly which connects to the eye by grasping a special Flieringa ring sewed to the postlimbal sclera.
A E, Kreiger, B R, Straatsma
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