Does a line guide improve reading performance with stand magnifiers?
Does a line guide improve reading performance with stand magnifiers?
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线路指南是否可以提高立式放大镜的阅读性能？
DOI：
10.1097/opx.0b013e3181b4c4d9
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Lovie-Kitchin,JanE
中科院分区：
文献类型：
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作者：
Cheong,AllenMY;Bowers,AlexR;Lovie-Kitchin,JanE
目的：当使用立式放大镜 (SM) 阅读时，沿着每行文本导航并返回到下一行开头的正确位置已被认为是弱视人士面临的主要困难。在这项研究中，我们评估了使用简单且廉价的线路指南对导航性能的直接影响。方法。29 名患有年龄相关性黄斑变性的参与者使用他们习惯的 SM 在附加或不附加临时线路指南的情况下阅读短文本段落。使用 3 SPACE Isotrak 系统记录放大镜的移动。确定了读取时间、放大器移动策略、导航时间和导航误差。使用简短的问卷来量化参与者对页面导航的感知困难以及他们对有或没有线路指南的阅读的偏好。结果。对于一些参与者来说，线路指南改善了沿线阅读时对 SM 垂直定位的控制 (p = 0.01)，但它增加了回扫结束时纠正垂直运动的数量 (p = 0.001)。使用线路指南时，阅读速度有小幅但显着的下降（约 6 WPM），导航时间增加（p < 0.05）；然而，48% 的参与者表示更喜欢阅读附有 SM 的内容。对于那些喜欢路线指南的人来说，有一种趋势（p = 0.08）报告 SM 操作有更大的习惯性困难。结论。仅在如何使用路线指南的最少指导后，前进导航控制得到改善，但指南的设计使将 SM 回溯到下一行的开头变得更加困难，导致阅读速度变慢。尽管如此，48% 的参与者表示更愿意将线路指南附在他们的 SM 上。建议改进线路指南的设计和可以提高回程导航性能的策略。
Purpose.When reading with a stand magnifier (SM), navigation along each line of text and retracing back to the correct position at the beginning of the next line has been suggested as a major difficulty for people with low vision. In this study, we evaluated the immediate impact of using a simple and inexpensive line guide on navigation performance.Methods.Twenty-nine participants with age-related macular degeneration read short passages of text using their habitual SM with and without a temporary line guide attached. Magnifier movements were recorded using a 3 SPACE Isotrak system. Reading time, magnifier movement strategies, navigation times, and navigation errors were determined. A short questionnaire was used to quantify participants' perceived difficulties with page navigation and their preference for reading with or without the line guide.Results.For some participants, the line guide improved the control of the vertical positioning of the SM when reading along a line (p= 0.01), but it increased the number of corrective vertical movements at the end of the retrace (p= 0.001). There was a small but significant decrease (about 6 wpm) in reading speed and increase in navigation times (p< 0.05) when using the line guide; however, 48% participants indicated a preference for reading with it attached to their SM. There was a trend (p= 0.08) for those who preferred the line guide to report greater habitual difficulties with SM manipulation.Conclusions.After only minimal instruction in how to use the line guide, forward navigation control improved, but the design of the guide made retracing the SM to the start of the next line more difficult resulting in slower reading speeds. Nevertheless, 48% of participants expressed a preference for having the line guide attached to their SM. Improvements to the design of the line guide and strategies that may improve retrace navigation performance are suggested.