title: A comparison of eight test location configurations for estimating G1 mean defect values.
abstract: Examinations performed with the Octopus G1 glaucoma program can last up to 20 minutes or more and this may be too long for some patients who are easily fatigued. It may also be that the examiner wishes to have a first look at examination results and then decide whether to continue examining or be satisfied with preliminary values. Eight different test location configurations consisting of 4, 8, 12, 16, 20, 24, 28 and 32 test locations for obtaining a first look at a visual field were investigated based on 764 examinations of normal and pathological visual fields. The mean errors in estimating the mean defect expected for each configuration were calculated. The results indicate that using configurations with 24 or 28 test locations for an advance estimate of the mean defect produces the least amount of error.
authors.affiliation: University Eye Clinic, Insel Hospital, Berne, Switzerland.
authors.forename: A
authors.initials: A
authors.lastname: Funkhouser
authors.forename: F
authors.initials: F
authors.lastname: Fankhauser
authors.forename: H
authors.initials: H
authors.lastname: Hirsbrunner
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D003936:Diagnosis, Computer-Assisted; D005901:Glaucoma / Q000175:diagnosis*; D006801:Humans; D008722:Methods; D008875:Middle Aged; D013997:Time Factors; D058609:Visual Field Tests; D014794:Visual Fields