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Ryu Iikawa, Tetsuya Togano, Yuta Sakaue, Aki Suetake, Ryoko Igarashi, Takeo Fukuchi; Comparison between estimated central 10 degrees visual field from En-face imaging of Swept-Source optical coherence tomography and Humphrey 10-2 Visual Field.. Invest. Ophthalmol. Vis. Sci. 2018;59(9):4082.
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© ARVO (1962-2015); The Authors (2016-present)
To estimate the central 10 degrees visual fields from En-face imaging of Swept-Source optical coherence tomography (SS-OCT) and compare with Humphrey 10-2 Visual Field.
38 eyes from 38 patients with POAG or NTG were examined using SS-OCT. Mean age was 56.5±9.7 years old and mean spherical equivalent error was -4.3±4.0 diopter. Three-dimensional 6 times 6 mm cube raster scans of the optic nerve head and macular were obtained with SS-OCT. The nerve fiber bundles (NFB) were observed after flatten processing against the inner limiting membrane. After putting the points corresponding to Humphrey 10-2 Visual Field on the acquired imaging, we judged having NFB defects or not in each of the points and made the estimated central 10 degrees visual fields. Then we compared with Humphrey 10-2 Visual Field. We evaluated the accuracy by kappa coefficient.
The kappa coefficient was 0.78 when we defined the sensitivity points of <1% in total deviation as a visual field defects. In the comparison based on the spherical equivalent error, the kappa coefficient was 0.78 for more than -6 diopter and 0.74 for less than -6 diopter. There was no difference in the accuracy. In the comparison by cluster, the kappa coefficient was higher in the papillomacular area but lower in the periphery area.
We can estimate the central 10 degrees visual field by En-face imaging of SS-OCT. This method may be useful for the patients who can’t examine and get high-reliability results.
This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.
Putting the points corresponding to Humphrey 10-2 Visual Field on the acquired En-face imaging.
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