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Takushi Kawamorita, Kanto Miyazaki, Takeshi Yamazaki, Saki Takahashi, Momoko Nakatani, Sanae Miyaji, Tomoya Handa, Nobuyuki Shoji; Effectiveness of barrier-free display on accommodation. Invest. Ophthalmol. Vis. Sci. 2018;59(9):2943.
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© ARVO (1962-2015); The Authors (2016-present)
The purpose of the study was to investigate effectiveness of barrier-free display (BFD; Olympus Co Ltd, Tokyo, Japan) on accommodation. The BFD use microlens-array-based exit-pupil expander.
Fifteen eyes from 15 subjects (mean age 21.1 years) with no ophthalmic disease other than refractive errors were enrolled. The objective refraction was measured with WAW-5500 (Shigiya Machinery Works Ltd, Hiroshima, Japan), which can measure in open-view under examinations of visual function. The accommodative demand was from 1.0 D to 5.0 D. The tenets of the Declaration of Helsinki were followed in this study and informed consent was obtained from all subjects. The Institutional Review Board at Kitasato University School of Allied Health Sciences approved the prospective study.
The objective refraction of accommodative demand 1.0 D, 2.0 D, 3.0 D, and 5.0 D in the smartphone display was -0.71 ± 1.0 D, -1.23 ± 0.77 D, -1.94 ± 1.18 D, and -3.51 ± 2.25 D, respectively (ANOVA, p < 0.01). That in the BFD was -0.22 ± 0.59 D, -0.15 ± 0.57 D, -0.11 ± 0.46 D, and -0.21 ± 0.52 D, respectively (ANOVA, p > 0.05). The objective refraction in smartphone display significantly showed a myopic shift compared with the BFD (two-way ANOVA, p < 0.01).
Our results reveal that the BFD does not require accommodation under the near viewing condition. Therefore, the BFD could be helpful for near works, and could be a potential device for presbyopia, and prevention of eyestrain or myopia progression.
This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.
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