![]() The Humphrey Visual Field Analyzer has eleven screening programs available. In order to expedite visual field testing, relieve patient fatigue, and more rapidly determine if the visual field is normal, screening programs have been attempted. Routine static threshold perimetry of the central 30 degrees of the visual field using 76 points may take as long at 20 minutes in an eye with severe abnormality, and as much as 15 minutes in a normal eye. Nevertheless, the test is time consuming and arduos for the patients. Computerization has reduced operator training as well as shortening the duration of the test. Since that time, a variety of other instruments have become available for static threshold analysis of the visual field. The effective development of screening devices requires characterization of slopes in normal populations.Ĭomputerized perimetry for sophisticated threshold analysis of the visual field became clinically feasible with the introduction of the Octopus perimeter. This is probably due to variation in stimulus exposure time, 0.2 seconds in the Humphrey vs. The authors found approximately 4 dB higher threshold sensitivity in the Humphrey than in the Octopus. Slopes were noted to be steeper in the superior than the inferior field. ![]() Field test results were compared between the Octopus Perimeter and the Humphrey Automated Field Analyzer.
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