Learning effect among perimetric novices with screening C-20-1 frequency doubling technology perimetry.

Abstract

To investigate whether perimetric novices without glaucoma demonstrate a learning effect using screening-mode frequency doubling technology perimetry. Prospective observational study. The study included 101 healthy subjects who had never undergone automated perimetry and who were administered the C-20-1 version of the frequency doubling technology. Subjects who returned an abnormal or unreliable test were retested until a normal result was obtained. Ninety-seven subjects (96%) returned a normal examination after one test, and 99 (98%) did so after two tests. Two subjects had abnormal initial tests, and two others had unreliable tests. These four subjects required repeat (up to four) testings to return a normal test. A small percentage of perimetric novices will demonstrate a learning effect using C-20-1 perimetry, but this mode has high specificity appropriate for glaucoma screening.