NDLI: Handheld shape discrimination hyperacuity test on a mobile device for remote monitoring of visual function in maculopathy.

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Handheld shape discrimination hyperacuity test on a mobile device for remote monitoring of visual function in maculopathy.

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Handheld shape discrimination hyperacuity test on a mobile device for remote monitoring of visual function in maculopathy.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Zhang, Song Mitzel, Gina Wang, Yi-Zhong He, Yu-Guang Bartlett, Mike
Description	Country affiliation: United States Author Affiliation: Wang YZ ( Retina Foundation of the Southwest, 9600 North Central Expressway, Suite 200, Dallas, TX 75231, USA. yiwang@retinafoundation.org)
Abstract	PURPOSE: Frequency monitoring of age-related macular degeneration (AMD) and diabetic retinopathy (DR) is crucial for timely intervention. This study evaluated a handheld shape discrimination hyperacuity (hSDH) test iPhone app designed for visual function self-monitoring in patients with AMD and DR. METHODS: One hundred subjects (27 visually normal, 37 with AMD, and 36 with DR) were included based on clinical documentation and visual acuity of 20/100 or better. The hSDH test was implemented on the iOS platform. A cross-sectional study was conducted to compare the hSDH test with a previously established desktop SDH (dSDH) test and to assess the effect of disease severity on the hSDH test. A user survey was also conducted to assess the usability of the hSDH test on the mobile device. RESULTS: The hSDH test and dSDH test were highly correlated (r = 0.88, P < 0.0001). Bland-Altman analysis indicated no significant difference in hSDH and dSDH measurements. One-way ANOVA indicated that the mean hSDH measurement of the eyes with advanced AMD (n = 16) or with severe to very severe nonproliferative DR (NPDR) (n = 12) was significantly worse than that of the eyes with intermediate AMD (n = 11) or with mild to moderate NPDR (n = 11) (P < 0.0001). Ninety-eight percent of 46 patients (10 with AMD and 36 with DR) who completed the usability survey reported that the hSDH test was easy to use. CONCLUSIONS: This study demonstrated that the hSDH test on a mobile device is comparable to PC-based testing methods. As a mobile app, it is intuitive to use, readily accessible, and sensitive to the severity of maculopathy. It has the potential to provide patients having maculopathy with a new tool to monitor their vision at home.
ISSN	01460404
e-ISSN	15525783
DOI	10.1167/iovs.13-12037
Journal	Investigative Opthalmology & Visual Science
Issue Number	8
Volume Number	54
Language	English
Publisher	Association for Research in Vision and Ophthalmology
Publisher Date	2013-08-13
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Cell Phones Form Perception Macular Degeneration Physiopathology Monitoring, Physiologic Remote Sensing Technology Instrumentation Visual Acuity Cross-sectional Studies Reproducibility Of Results Comparative Study Research Support, N.i.h., Extramural Discipline Ophthalmology
Content Type	Text
Resource Type	Article
Subject	Ophthalmology Sensory Systems Cellular and Molecular Neuroscience

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