LOW VISION AID FOR OBSERVERS WITH CENTRAL VISION LOSSES

描述(研究人员摘要)：低视力助视器是在 这项研究将提供一种电子设备来帮助视障人士 人们最大限度地利用他们的残余视力，使用创新的形象 增强滤镜将在商业上作为选项提供 当前的闭路电视(CCTV)读取器。这些滤镜通过以下方式增强文本 优化低视力观察者的剩余对比敏感度，以及 将文本呈现为比黑色更容易察觉的灰色阴影 还有白色的。第一阶段的目标是确定改进后的 低视力观察者在观看静态单词时的阅读成绩 在屏幕中间一次呈现一个，延伸到连续 以不同的速度在屏幕上滚动的文本，如上所用 闭路电视。第一阶段的具体目标是：1)实现软件 需要：使用与CCTV和2相同的格式生成文本 测量低视力观察者的阅读率在以下情况下是否有所提高 与未过滤文本相比，阅读移动的连续过滤文本 具有相同的放大倍数。当这个项目的可行性是 在第一阶段结束时显示，则第二阶段资金将用于进行 确定最佳硬件配置所需的所有研究 构建商业上可用的经济高效的设备，以显著 提高低视力观察者的阅读成绩。

DESCRIPTION (Investigator's Abstract): The low vision aid developed during this study will provide an electronic device to help visually impaired persons maximize the use of their residual vision, using innovative image enhancement filters that will be available commercially as an option on current closed-circuit TV (CCTV) readers. These filters enhance text by optimizing the low vision observer's remaining contrast sensitivity, and render the text in shades of gray that are more easily perceived than black and white. The objective of Phase I is to determine whether the improved reading performance of low vision observers found when viewing static words presented one at a time in the middle of the screen, extends to continuous text that is scrolled across the screen at different speeds, as used on CCTVs. The specific aims of Phase I are to: 1) Implement the software needed to: generate text using the same format used on CCTVs and 2) Measure whether the reading rates of low vision observers are improved when reading moving continuous filtered text, when compared to unfiltered text having the same magnification. When the feasibility of this project is shown at the end of Phase I, then Phase II funding will be used to conduct all the research needed to determine the optimum hardware configuration for building a commercially available cost-effective device to significantly improve the reading performance of low vision observers.