Reading from electronic devices versus hardcopy text

摘要: Background The use of electronic reading devices has increased dramatically. However, some individuals report visual symptoms when from screens. Objective This investigation compared two (Amazon Kindle or Apple Ipod) versus hardcopy text in groups 20 subjects. Methods Subjects performed a min task for each condition. Both the accommodative response and rate were monitored during trial. Immediately post-task, subjects completed questionnaire concerning ocular experienced task. Results In comparing with hardcopy, no significant difference total symptom score was observed, although mean tired eyes eye discomfort significantly higher Kindle. No differences found. When Ipod scores slower than while lag accommodation larger Ipod. Conclusions Given increase Kindle, reduced Ipod, one may conclude that is not equivalent to hardcopy.