A new visual field test on a personal computer for glaucoma screening: A comparison with the humphrey visual field

Shimon Kurtz, Yoseph Glovinsky

Research output: Contribution to journalArticlepeer-review

Abstract

A new 1.5-minute screening test for glaucoma using either a personal computer or a laptop computer was programmed and evaluated. Fourteen points, 3 to 18 degrees from fixation, that were matched to 14 Humphrey visual field points and two additional points that matched the blind spot location were chosen for the test. The test was based on a fixed background color. Single or double horizontal lines in a different color served as the stimulus. The patient pressed the space bar once if he saw one line and twice if he saw two lines. The results were compared with the Humphrey Statpac total deviation and analyzed for specificity and sensitivity. Glaucoma suspect and glaucomatous patients participated in the study. One hundred thirteen eyes were tested with a black background and white lines (BW), 114 eyes with a yellow background and blue lines (YB), and 55 eyes with a gray background and blue lines (GB). The GB test was done on a laptop computer. The results were classified according to one of three categories, based on the Humphrey total deviation: -9dB or less (normal), between -10dB and -19dB (moderate defect), and greater than -20dB (advanced defect). The BW test had 96% specificity and 74% sensitivity (ability to detect advanced defects). The YB test had 93% specificity and 86% sensitivity, and the GB test had 93% specificity and 78% sensitivity. Moderate defects were detected in 16%, 44%, and 30% of the patients in the BW, YB, and GB tests, respectively. The new test has acceptable specificity and sensitivity and will probably detect deep paracentral scotomas within 18 degrees of fixation.

Original languageEnglish
Pages (from-to)88-92
Number of pages5
JournalAnnals of Ophthalmology - Glaucoma
Volume28
Issue number2
StatePublished - 1996

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