Comparative effectiveness between two types of head-mounted magnification modes using a smartphone-based virtual display
- PMID: 38551973
- PMCID: PMC11239311
- DOI: 10.1097/OPX.0000000000002115
Comparative effectiveness between two types of head-mounted magnification modes using a smartphone-based virtual display
Abstract
Significance: This work shows the benefits of using two different magnification strategies to improve the reading ability of low-vision patients using a head-mounted technology.
Purpose: The aim of this study was to conduct a comparative clinical trial evaluating the effectiveness of two magnification strategies in a head-mounted virtual reality display.
Methods: Eighty-eight eligible low-vision subjects were randomized into two arms: (1) the full-field magnification display or (2) the virtual bioptic telescope mode. Subjects completed baseline testing and received training on how to use the device properly and then took the device home for a 2- to 4-week intervention period. An adaptive rating scale questionnaire (Activity Inventory) was administered before and after the intervention (home trial) period to measure the effect of the system. A Simulator Sickness Questionnaire was also administered. Baseline and follow-up results were analyzed using Rasch analysis to assess overall effectiveness of each magnification mode for various functional domain categories.
Results: Both magnification modes showed a positive effect for reading, visual information, and the overall goals functional domain categories, with only reading reaching statistical significance after correction for multiple comparisons. However, there were no significant between-group differences between the two modes. The results of the Simulator Sickness Questionnaire showed that the magnification modes of the head-mounted display device were overall well tolerated among low-vision users.
Conclusions: Both the full-field and virtual bioptic magnification strategies were effective in significantly improving functional vision outcomes for self-reported reading ability.
Trial registration: ClinicalTrials.gov NCT03728660.
Copyright © 2024 American Academy of Optometry.
Conflict of interest statement
Conflict of Interest Disclosure: None of the authors have reported a financial conflict of interest.
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References
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- Massof RW, Rickman DL, Lalle PA. Low-vision enhancement system. J Hopkins Apl Tech D 1994;15:120–5.
-
- Massof RW, Rickman DL. Obstacles encountered in the development of the low vision enhancement system. Optom Vis Sci 1992;69:32–41. - PubMed
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LWW MOVE TO TEXT AS: Mehta M, et al. IOVS 2018;59:ARVO E-Abstract 633.
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