Reading Enhancement for Patients with Visual Field Loss

视野丧失患者的阅读增强

• 批准号: 6696249
• 负责人: Michael A Sandberg
• 金额: $ 12.9万
• 依托单位: HARVARD MEDICAL SCHOOL
• 依托单位国家: 美国
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-08-01 至 2004-12-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6696249
• 关键词: assistive device /technology; behavioral /social science research tag; computer program /software; glaucoma; human subject; longitudinal human study; ophthalmoscopy; patient oriented research; perimetry; questionnaires; reading; rehabilitation; retina degeneration; scotoma; stroke; vision aid; vision disorders; vision tests; visual fields; visual perception

DESCRIPTION: (Applicant's Abstract) According to The National Advisory Eye Council, a program goal is to "Develop assistive devices ... and rehabilitation strategies to minimize the impact of visual impairment in everyday life, and reduce disability and societal limitations among visually impaired persons" (Vision Research-A National Plan: 1999-2003, National Eye Institute). In accordance with this guideline, the proposed pilot study will measure and attempt to correct the reading disability of patients who retain only a small central island of vision due to advanced retinal degeneration or glaucoma, or only the left or right visual field due to stroke. These patients, who number in the thousands in the United States, are handicapped for reading standard, stationary text because they lack adequate parafoveal visual cues for smoothly shifting fixation from word to word and from line to line, and because some have reduced visual acuity as well. We plan to evaluate 150 patients with different forms of retinal degeneration or glaucoma and 30 patients with stroke. This program will quantify their reading speeds to standard, stationary text and relate reading speed to conventional measures of vision to develop a quantitative clinical frame of reference for their reading disability. We will explore whether their reading speeds to stationary text can be improved by tailoring the letter spacing, letter size, page width, and contrast polarity to their disease type and stage. Testing will also involve measuring their reading speed to text presented serially to the same location of the visual field, a format that minimizes the need for eye movements, and that should, therefore, little depend upon the absence of parafoveal cues; this format has been reported to result in up to four-fold faster reading by normal subjects. Since software is available for presenting text serially to the same location, either on-line or off-line, and since palmheld wireless devices are commercially available, a serial mode of presentation could be a practical, mobile solution for patients with these types of visual field loss.

描述：（申请人摘要）根据国家咨询之眼 理事会的一项计划目标是“开发辅助设备……和康复 尽量减少日常生活中视力障碍的影响的策略，以及 减少视障人士的残疾和社会限制” （视觉研究国家计划：1999-2003 年，国家眼科研究所）。在 根据本指南，拟议的试点研究将衡量和 尝试纠正仅保留少量信息的患者的阅读障碍 由于晚期视网膜变性或青光眼导致的中央视觉岛，或 由于中风，只有左或右视野。这些患者，数量 在美国有数千人患有阅读标准障碍， 固定文本，因为它们缺乏足够的中央凹视觉线索来顺利进行 将注意力从一个词转移到另一个词，从一行转移到另一行，因为有些 视力也下降了。 我们计划评估 150 名患有不同形式视网膜变性的患者 或青光眼和 30 名中风患者。该计划将量化他们的 阅读速度与标准、固定文本相关，并将阅读速度与 常规视力测量，以开发定量临床框架 为他们的阅读障碍提供参考。我们将探讨他们的阅读是否 可以通过调整字母间距来提高固定文本的速度， 字母大小、页面宽度以及与其疾病类型和阶段的对比极性。 测试还包括测量他们对所呈现文本的阅读速度 连续到视野的同一位置，这种格式可以最大限度地减少 眼球运动的需要，因此，这应该很少依赖于 缺乏中央凹旁线索；据报道，这种格式最多可产生 正常受试者的阅读速度提高了四倍。由于软件可用于 将文本连续呈现到同一位置（在线或离线），以及 由于掌上无线设备已商用，串行模式 对于患有这些疾病的患者来说，演示可能是一种实用的移动解决方案 视野丧失的类型。