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Date Published: 02/06/2021
Abstract Views: 113
Views PDF: 143
DOI: https://doi.org/10.51298/vmj.v499i1-2.266
Issue
Vol. 499 No. 1-2 (2021)
Section
Các bài báo
How to Cite
Thị Thu Hiền, N. (2021). COMPARISON ON THE EFFECT OF NEAR VISION AIDS FOR LOW VISION BY OPTICAL MAGNIFIERS AND MAGNIFIER VIDEO HANDHELD DEVICE. Vietnam Medical Journal, 499(1-2). https://doi.org/10.51298/vmj.v499i1-2.266

COMPARISON ON THE EFFECT OF NEAR VISION AIDS FOR LOW VISION BY OPTICAL MAGNIFIERS AND MAGNIFIER VIDEO HANDHELD DEVICE

Nguyễn Thị Thu Hiền

Main Article Content

Abstract

Aims: To compare the effect of near vision aids for low vision by optical magnifiers and magnifier video handheld device.      Methods: The descriptive study was conducted in 80 low vision people from 7 to 71 years old. Results: The average power of optical magnifiers was +24.6 ± 11.4 D. The average power of MVHD was +18.8 ± 8.3 D; Near visual acuity: before aids was 20/500 ± 20/630; with optical magnifiers was 20/250 ± 20/500; with MVHD was 20/125 ± 20/320 (p<0.001). The reading distance: before aids was 4.42 ± 2.81cm; with optical magnifiers was 7.74 ± 4.17cm; with MVHD was 16.38 ± 7.26cm (p<0.001). The reading speed: before aids was 23.46 ± 10.52 words/minute; with optical magnifiers was 43.74 ± 22.57 words/minute; with MVHD was 61.2 ± 24.8 words/minute (p<0.001). Conclusion: The near visual acuity, the reading distance, the reading speed of low vision by using the MVHD were much better than the use of the optical magnifiers.

Article Details

Keywords

low vision, optical magnifier, Magnifier Video Handheld Device

References

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