Reliability Indexes of Automated Perimetric Tests.

Lee, Dong Ho; Kim, Jong Ku; Choe, Young Joo; Hong, Young Jae

Original Article

Journal of the Korean Ophthalmological Society 1993;34(1):61-64.
Published online January 1, 1993.

Reliability Indexes of Automated Perimetric Tests.

Dong Ho Lee, Jong Ku Kim, Young Joo Choe, Young Jae Hong

Department of Ophthalmology, Yonsei University, College of Medicine, Seoul, Korea.

자동시야검사계의 신뢰지수

이동호(Dong Ho Lee),김종구(Jong Ku Kim),최영주(Young Joo Choe),홍영재(Young Jae Hong)

Abstract

The "reliability" of a subject's automated perimetric result is generally assessed by three measures: fixation loss, false positive and false negative rates. These reliability indicies were examined for 237 glaucomatous and ocular hypertensive eyes who for the first time underwent visual field testing (central 30-2 test on Humphrey visual field analyzer. Allergan Humphrey). Of the examination results, 11% of subjects were considered unreliable with the use of the manufacturer's reliability criteria. 71% of the unreliable results were due to failure to meet the criterion for fixation loss. The rest 29% were due to high false negative rates. After given reinstruction and more attention to fixation loss throughout the test by the technician, second visual field test was performed. On second examination, 82% of fixation loss and 71% of false negative rate was reduced.

Key Words: False negative rate;False positive rate;Fixation loss;Reliability