Results 291 to 300 of about 1,758,771 (323)
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TESTING VISUAL FIELDS BY FLICKER FUSION

Archives of Neurology And Psychiatry, 1951
THE CRITICAL rate at which a flickering light of decreasing frequency is first perceived to flicker is the one test of visual function in which the light-adapted eye is more sensitive at the periphery of the retina than at its center. Previous investigators have agreed that flicker fusion fields are sensitive and "typical" in neurological lesions ...
openaire   +4 more sources

Reliability of Simultaneous Visual Field Testing

Ophthalmology, 2012
To test for differences in reliability and performance between traditional, isolated perimetry and simultaneous testing with 2 patients in the same room.Comparative case series.A total of 471 eyes of 261 subjects.Consecutive patients undergoing Humphrey visual field (VF) testing in the Kellogg Eye Center glaucoma clinic were screened.
Leslie M. Niziol   +3 more
openaire   +2 more sources

A comparison of experienced clinical observers and statistical tests in detection of progressive visual field loss in glaucoma using automated perimetry.

A M A Archives of Ophthalmology, 1988
The visual fields of 30 patients (subjects) with glaucoma were sent to six experienced clinicians (observers). Each subject had at least four visual field examinations on the OCTOPUS 201 automated perimeter spanning at least one year.
Elliot B. Werner   +8 more
semanticscholar   +1 more source

Signal/noise analysis to compare tests for measuring visual field loss and its progression.

Investigative Ophthalmology and Visual Science, 2009
PURPOSE To describe a methodology for establishing signal-to-noise ratios (SNRs) for different perimetric techniques, and to compare SNRs of frequency-doubling technology (FDT2) perimetry and standard automated perimetry (SAP). METHODS Fifteen patients
P. Artes, B. Chauhan
semanticscholar   +1 more source

Visual Fields: Visual Field Test Strategies

2009
The 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.
openaire   +2 more sources

Automated instruments for testing the visual field [PDF]

open access: possibleBiomedical Engineering, 1987
On the surface of the hemispherical screen, which is painted with a white deadening nonflash paint, holes 1 mm in diameter are located along 24 meridians, with 16 holes per meridian, behind which are the light diodes which are the objects of presentation. Red AL307 light diodes are used as test objects.
V. N. Kiryukhova   +3 more
openaire   +1 more source

Test Conditions in Macular Visual Field Testing in Glaucoma

Journal of Glaucoma, 2017
Purpose: The purpose of this study is to evaluate the suitable visual field (VF) test conditions (target size, test type, and eccentricity) for the macular region, we investigated the correlations between the ganglion cell layer (GCL) thickness and 6 VF test results.
Hiroki Nomoto   +7 more
openaire   +3 more sources

The Relationship Between Visual Acuity and the Reproducibility of Visual Field Measurements in Glaucoma Patients.

Investigative Ophthalmology and Visual Science, 2015
PURPOSE The purpose of this study was to investigate the association between visual acuity (VA) and reproducibility of test-retest visual field (VF) measurements in glaucoma patients.
Masato Matsuura   +3 more
semanticscholar   +1 more source

Visual Field Testing in the Management of Cytomegalovirus Retinitis

Ophthalmology, 1992
Sequential visual field testing is an extremely helpful adjunct to ophthalmoscopy and fundus photography in the management of cytomegalovirus (CMV) retinitis with the antiviral agents ganciclovir or foscarnet in patients with the acquired immune deficiency syndrome (AIDS).
Douglas J. Ward   +7 more
openaire   +4 more sources

Confrontation visual field testing: detecting gross visual field defects

International Journal of Ophthalmic Practice, 2011
Performing confrontation visual fields is a quick and relatively easy way of detecting gross visual field defects. It requires little or no special equipment and can be performed in practically any situation, including during domiciliary visits. The practitioner should be familiar with the types of confrontation visual field tests and their uses and ...
Chris Smith Rgn, Ond
openaire   +2 more sources

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