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Abstract #8147 Published in IGR 4-3
New developments in supra-threshold perimetry
Henson DB; Artes PHOphthalmic and Physiological Optics 2002; 22: 463-468
PURPOSE: To describe a series of recent enhancements to suprathreshold perimetry. METHODS: Computer simulations were used to develop an improved algorithm (HEART) for the setting of the suprathreshold test intensity at the start of a field test, and to evaluate the relationship between various pass/fail criteria and the test's performance (sensitivity and specificity) and how they compare with modern threshold perimetry. Data were collected in optometric practices to evaluate HEART and to assess how the patient's response times can be analyzed to detect false positive response errors in visual field test results. RESULTS: The HEART algorithm shows improved performance (reduced between-eye differences) over current algorithms. A pass/fail criterion of 'three stimuli seen of three to five presentations' at each test location reduces test/retest variability and combines high sensitivity and specificity. A large percentage of false positive responses can be detected by comparing their latencies to the average response time of a patient. CONCLUSIONS: Optimized suprathreshold visual field tests can perform as well as modern threshold techniques. Such tests may be easier to perform for novice patients, compared with the more demanding threshold tests.
D.B. Henson, MD, Academic Department of Ophthalmology, University of Manchester, Royal Eye Hospital, Manchester, UK. david.henson@man.ac.uk
Classification:
6.6.3 Special methods (e.g. color, contrast, SWAP etc.) (Part of: 6 Clinical examination methods > 6.6 Visual field examination and other visual function tests)
