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DP Crabb, AC Viswanathan, FW Fitzke, RA Hitchings; Integrated Visual fields: A New Approach to Estimating Binocular Visual Fields and Visual Disability . Invest. Ophthalmol. Vis. Sci. 2002;43(13):2143.
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Purpose: We have developed a method of quantifying the central binocular visual field by merging results from monocular fields (Integrated visual field)1. To compare the performance of the new measure with the binocular Esterman Visual Field Test (EVFT) in identifying patients with self-reported visual disability. To examine the relationship between the new measure and the Useful Field of View (UFOV) test. Methods: Forty-eight patients with glaucoma each recorded Humphrey 24-2 fields for both eyes and a binocular EVFT on the same visit. They each completed a binary forced-choice questionnaire relating to perceived visual disability2. Computer software merged sensitivity values from monocular fields to generate an integrated visual field and a related score of the percentage of defects at the <10dB and <20dB level. Receiver operating characteristic (ROC) analysis was used to compare the integrated visual field score and the EVFT score with individual responses to the questions on perceived difficulty with visual tasks. Results: Comparison of areas under ROC curves revealed that the integrated visual field measure was generally better (median area: 0.85) than EVFT scores (median area: 0.72) in classifying patients with or without a self reported visual disability. Comparison between the integrated visual field measure, EVFT and UFOV test results will also be presented. Conclusion: The integrated visual field provides a rapid assessment of a patient's binocular visual field without extra perimetric testing and it appears to provide a better prediction of a patient's inability to perform visual tasks than the binocular EVFT. The integrated visual field may be useful in alerting patients to compromises in their visual function that may, for example, have a bearing on fitness to drive. 1.Crabb DP et al. (1998). Br J Ophthalmol. 82: 1236-1241. 2.Viswanathan AC et al. (1999). Arch Ophthalmol. 117: 450-454.
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