LOW VISION READING AND TYPEFACE VARIABLES

低视力阅读和字体变量

• 批准号: 6164690
• 负责人: DEAN YAGER
• 金额: $ 25.68万
• 依托单位: STATE COLLEGE OF OPTOMETRY
• 依托单位国家: 美国
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-03-01 至 2002-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6164690
• 关键词: congenital vision disorder; form /pattern perception; human subject; information display; nystagmus; reading; videotape /videodisc; vision aid; vision disorders; vision tests; visual fields; visual perception

DESCRIPTION: The aims of the proposed research are to determine which typeface characteristics may enable faster reading by normally-sighted and low vision readers on video display terminals, and which will allow satisfactory reading speeds with the smallest character size. Two categories of low vision subjects will be tested: 1) a group of AMD patients with central field loss and 2) a group of subjects with congenital nystagmus and no field loss. Five experiments are proposed. First is a replication of the Legge, et al., 1985 study which measures reading speed n normally-sighted observers as a function of character size, letter spacing, blur, and contrast. Second, reading speed will be measured in normally-sighted subjects for three different text display formats sequential word presentation (RSVP), sequential sentence presentation (FLASHCARD), and presentation of multiple lines of text (MNREAD). Reading speed will be defined by exposure duration of a sentence, as opposed to number of words spoken per minute. Horizontal eye movements will be recorded during reading. Third, reading speed will be measured in normally-sighted subjects as a function of letter size (relative to visual acuity), contrast, and blur for RSVP, FLASHCARD, and SCROLL display formats while horizontal eye movements are recorded. This experiment will be performed with the subject fixating the text and, for the RSVP format only, with the text presented to the peripheral retina. Text font will be parameterized to study the effects of serifs, "modulation," and stroke width on reading performance. Experiment 4 repeats experiments 2 and 3 on low vision subjects and proposes to test customized "Superfonts." Experiment 5 will compare self-paced extended page reading to RSVP reading.

描述：拟议研究的目的是确定 字体特征可以使正常视力的人能够更快地阅读 和低视力阅读器的视频显示终端，这将允许 以最小的字符尺寸获得令人满意的阅读速度。 两 将测试以下类别的低视力受试者：1）一组AMD受试者， 中心野丢失的患者和2）一组受试者， 先天性眼球震颤无视野缺损 提出了五个实验。 首先是Legge等人的复制，1985年研究衡量 正常视力观察者的阅读速度与性格的函数关系 大小、字母间距、模糊和对比度。 第二，阅读速度将 在视力正常的受试者中测量三种不同的文本 显示格式顺序字表示（RSVP），顺序句 演示文稿（闪存卡）和多行文本的演示文稿 （MNREAD）. 阅读速度将由 句子，而不是每分钟说的单词数。 水平 在阅读期间将记录眼球运动。 三、阅读速度 将在视力正常的受试者中作为字母的函数进行测量 RSVP的大小（相对于视力）、对比度和模糊度， FLASHCARD和SCROLL显示格式，而水平眼球运动是 记录下来。 该实验将在受试者注视下进行， 文本，并且仅对于RSVP格式，文本呈现给 周边视网膜 文本字体将被参数化以研究效果 衬线、“调制”和笔画宽度对阅读性能的影响。 实验4对低视力受试者重复实验2和3， 建议测试定制的“超级字体”“实验5将比较 自定进度的扩展页阅读到RSVP阅读。

项目成果

Low-vision patients with age-related maculopathy read RSVP faster when word duration varies according to word length.

当单词持续时间根据单词长度而变化时，患有年龄相关性黄斑病的低视力患者阅读 RSVP 的速度会更快。

• DOI: 10.1097/00006324-200105000-00012
• 发表时间: 2001
• 期刊: Optometry and vision science : official publication of the American Academy of Optometry
• 作者: Aquilante,K;Yager,D;Morris,RA;Khmelnitsky,F
• 通讯作者: Khmelnitsky,F