[Age-adjusted normal values with the Tübingen Automatic Perimeter TAP 2000 CC].

BACKGROUND

Evaluation of perimetric results requires a comparison with age-corrected values for the assessment of discrete light sensitivity changes. This is especially true in recording incipient glaucomatous visual field defects. The aim of the present study was to establish age-corrected normal values with the Tübingen Automatic Perimeter.

METHOD

A test group (n = 85) of ophthalmologically and clinically unremarkable subjects 18-70 years of age was examined. The criteria for exclusion from the study were glaucoma or hereditary eye disease in an immediate family relative, diabetes mellitus, unstable or manifest hypertonia, multiple sclerosis, convulsive disorders, a previous stroke, or the use of psychoactive drugs. A brief introductory program was used to familiarize the test person, together with a threshold program for values in the central visual field. In addition, the peripheral visual field was examined. The threshold-splitting program of the Tübingen Automatic Perimeter 2000cc was used for examinations. RESULTS/DISCUSSION. Age-related normal values were calculated both as regression lines and group averages by statistical analysis of the resulted data. Surprisingly, the decrease found in people 20-70 years of age was in the center with 0.5 dB clearly smaller than at the periphery with 4-6.5 dB. Details of the evaluation are described.