Results 291 to 300 of about 1,386,503 (343)
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MEASUREMENT OF THE VISUAL FIELD
Perceptual and Motor Skills, 2003There is increasing evidence that concurrent visual and nonvisual tasks not only reduce the size but also result in systematic deformation of the visual field. Given such complex changes in the visual field, appropriate representation and measurement of its shape is all important.
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Archives of Ophthalmology, 1967
The actual influence of the nose on the nasal visual field was examined by perimetric studies. Regardless of size of target stimulus or position of the face, the nasal 180° meridian could not be expanded beyond 64°. No significant differences were found in the extent of nasal field amongst Caucasians, Orientals, and Negroes. Scotopic isopters similarly
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The actual influence of the nose on the nasal visual field was examined by perimetric studies. Regardless of size of target stimulus or position of the face, the nasal 180° meridian could not be expanded beyond 64°. No significant differences were found in the extent of nasal field amongst Caucasians, Orientals, and Negroes. Scotopic isopters similarly
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Optometry and Vision Science, 2005
"Looked-but-failed-to-see" errors are a common cause of accidents, but it has never been determined whether obstructive elements within an automobile (e.g., window posts or the interior rearview mirror) have actually been an obstacle to vision. This work describes a technique that can easily be used to determine the available visual field of drivers at
Fernando, Vargas-Martín +1 more
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"Looked-but-failed-to-see" errors are a common cause of accidents, but it has never been determined whether obstructive elements within an automobile (e.g., window posts or the interior rearview mirror) have actually been an obstacle to vision. This work describes a technique that can easily be used to determine the available visual field of drivers at
Fernando, Vargas-Martín +1 more
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Visual Function Tests: Visual Fields
2022Visual field tests, also known as perimetry tests, are used to assess progression of ophthalmic diseases such as retinitis pigmentosa (RP) by monitoring changes in a patient's visual field (VF). VF loss corresponds to damage at any point in the visual pathway, including the retina, such as in RP. Damage to different parts of this pathway corresponds to
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Optometry and Vision Science, 1976
Diminishing telescope systems designed to widen the field of view of patients with tunnel vision are described. Theoretical analysis suggests that telescope systems will greatly improve visual search times and diminish the difficulties of such patients.
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Diminishing telescope systems designed to widen the field of view of patients with tunnel vision are described. Theoretical analysis suggests that telescope systems will greatly improve visual search times and diminish the difficulties of such patients.
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The Visual Field: Simultaneous Order in Immediate Visual Awareness
2014When you open your eyes in bright daylight, you become visually aware of the scene in front of you. That is to say, generically, for you might be blind, hallucinate, and so forth. To many people visual awareness appears three-fold extended in space, and evolving over time. One makes out objects and processes in intricate interrelations.
Koenderink, Jan +2 more
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Visual Fields: Visual Field Test Strategies
2009The question can be answered in many ways. First of all, there are visual field devices used to perform automated static perimetry and those for manual kinetic perimetry. Automatedtests utilize computer programs to vary test speed, target size, and luminance.
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Visual field in hysteria-reliability of visual field by Goldmann perimetry
Documenta Ophthalmologica, 1989Four cases with hysterical amblyopia in youngsters under 15-year-old showed the poor reproducibility of visual field, that is, when the same target was moved from the periphery toward the fixation ten times along the same meridian during the same examination, the position of the plotted points were rather variable.
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Molecular imaging in oncology: Current impact and future directions
Ca-A Cancer Journal for Clinicians, 2022Steven P Rowe, Martin G Pomper
exaly