Objective To evaluate visual quality before and after screen-reading using double-pass retinal images, and to analyze the relationship between refractive error and the stability of tear film and the amplitude of accommodation. Methods This was a prospective self-controlled study based on 53 college students (106 consecutive eyes). Tear film and accommodation were assessed before and 1 hour after screen-reading with double-pass retinal images. The differences in the measurement data were compared with paired t tests and independent samples t tests. A one-way ANOVA was used to compare the differences among three diefferent refractive error groups. Results Tear-film stability (t=-7.464, P<0.01) and the amplitude of accommodation (t=4.881, P<0.01) of the subjects showed a decrease after 1 hour of screen-reading, but there were no differences between genders (P>0.05). Tear film was more unstable before screen-reading and was correlated with an increase in refractive error, but the difference was not statistically significant. However, there was a statistically significant difference in accommodation between refractive groups (F=3.349, P<0.05), and the higher the refractive error, the lower the amplitude of accommodation. After 1 hour of screening-reading, tear film became more unstable and accommodation decreased as refractive error increased, but the difference was not significant (P>0.05). Conclusion Screen-reading causes a decrease in tear film stability and worsens accommodation, and the extent of these problems is related to the degree of myopia.
任骁方,肖林,陈思. 双通道视觉质量分析系统比较大学生手机阅读前后视觉质量差异[J]. 中华眼视光学与视觉科学杂志, 2015, 17(1): 44-47.
Ren Xiaofang,Xiao Lin,Chen Si.. Evaluating visual quality of university students before and after screen-reading using double-pass retinal images. Chinese Journal of Optometry Ophthalmology and Visual science, 2015, 17(1): 44-47. DOI: 10.3760/cma.j.issn.1674-845X.2015.01.011
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