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Zhichao Wu, Robyn H. Guymer, Chang J. Jung, Jonathan K. Goh, Lauren N. Ayton, Chi D. Luu, David J. Lawson, Andrew Turpin, Allison M. McKendrick; Measurement of Retinal Sensitivity on Tablet Devices in Age-Related Macular Degeneration. Trans. Vis. Sci. Tech. 2015;4(3):13. doi: https://doi.org/10.1167/tvst.4.3.13.
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We compared measurements of central retinal sensitivity on a portable, low-cost tablet device to the established method of microperimetry in age-related macular degeneration (AMD).
A customized test designed to measure central retinal sensitivity (within the central 1° radius) on a tablet device was developed using an open-source platform called PsyPad. A total of 30 participants with AMD were included in this study, and all participants performed a practice test on PsyPad, followed by four tests of one eye and one test of the other eye. Participants then underwent standardized microperimetry examinations in both eyes.
The average test duration on PsyPad was 53.9 ± 7.5 seconds, and no significant learning effect was observed over the examinations performed (P = 1.000). The coefficient of repeatability of central retinal sensitivity between the first two examinations on PsyPad was ±1.76 dB. The mean central retinal sensitivity was not significantly different between PsyPad (25.7 ± 0.4 dB) and microperimetry (26.1 ± 0.4 dB, P = 0.094), and the 95% limits of agreement between the two measures were between −4.12 and 4.92 dB.
The measurements of central retinal sensitivity can be performed effectively using a tablet device, displaying reasonably good agreement with those obtained using the established method of microperimetry.
These findings highlight the potential of tablet devices as low-cost and portable tools for developing and performing visual function measures that can be easily and widely implemented.
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