Purchase this article with an account.
MB Brush, PP Chen; Screening with Frequency Doubling Technology perimetry: Do subjects with glaucoma demonstrate a learning effect? . Invest. Ophthalmol. Vis. Sci. 2002;43(13):2152.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
Purpose: To investigate learning effects and fluctuation in glaucoma patients during screening with Frequency Doubling Technology (FDT) perimetry. Methods: Subjects with known glaucoma were recruited from the University of Washington Eye Center. All subjects had documented visual field defects by standard automated perimetry and a wide range of visual field loss was represented. After instruction, the C-20-1 screening mode of the FDT was consecutively administered three times. If any single test showed greater than 33% fixation losses or false positives the test was readministered up to a maximum of three times for each subject. Any demonstrated visual field defect was considered a positive diagnostic test. Results: Twenty-six subjects completed the protocol (mean age 65.3; range 43-85). Subjects did not demonstrate a statistically significant change in test score across the three testings (p=.952). Four subjects required a single additional test due to abnormal reliability indices. Agreement across stimulus points between tests averaged 59%. Conclusion: Subjects taking the FDT C-20-1 screening mode did not demonstrate a learning effect between testings when a reliable result was obtained. Concordance between subject tests was fair to good.
This PDF is available to Subscribers Only