Arabic Reading Performance With a Chromatic Acuity Chart.

IF 5 2区 医学 Q1 OPHTHALMOLOGY
Balsam Alabdulkader, Ali Almustanyir, Norah Alsalem, Essam Almutleb, Mosaad Alhassan, Jeffery K Hovis
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引用次数: 0

Abstract

Purpose: This study compared the reading performance for Arabic text defined by chromatic and achromatic contrast to understand better how chromatic contrast affects reading of normally sighted individuals and to establish a baseline for determining whether patients have a selective red-green chromatic sensitivity loss.

Method: Reading performance for Arabic text was accessed by examining maximum reading speed (MRS), reading acuity (RA), critical print size (CPS), and the Reading Accessibility Index (ACC) using three near-point charts. The charts were the black-on-white Balsam Alabdulkader-Leat (BAL) chart, a red-on-green chart, and a gray-on-gray chart with a background luminance equal to the chromatic chart.

Results: The MRSs were significantly different (P = 0.03), with the red-on-green chart having a slightly higher value than the BAL chart. The ACC was lower for the BAL chart than the red-on-green and gray charts (P = 0.003). However, RA for the BAL chart was better, and the CPS was smaller relative to the red-on-green chart (P < 0.05) and gray chart (P < 0.001). Individuals with red-green color vision deficiencies had poorer RA and larger CPS on the red-on-green chart relative to the achromatic charts.

Conclusions: Although the MRS and ACC of the chromatic chart were significantly higher, the difference was not clinically important. The result that the MRS was similar for all three charts confirmed earlier findings that MRS is similar if text contrast is sufficiently above threshold. The lower RA and corresponding larger CPS for the red-on-green and gray charts were due to their lower background luminance and lower contrast.

阿拉伯语阅读性能与一个彩色敏锐度图表。
目的:本研究比较了由色差和消色差对比度定义的阿拉伯语文本的阅读表现,以更好地了解色差对比度如何影响正常视力个体的阅读,并为确定患者是否有选择性红绿色差灵敏度丧失建立基线。方法:采用三张近点图检测阿拉伯文文本的最大阅读速度(MRS)、阅读敏锐度(RA)、临界打印尺寸(CPS)和阅读可及性指数(ACC),考察阿拉伯文文本的阅读性能。这些图表是黑对白香脂(BAL)图表、红对绿图表和背景亮度等于彩色图表的灰对灰图表。结果:MRSs差异有统计学意义(P = 0.03),其中红绿图略高于BAL图。BAL图的ACC低于红绿图和灰色图(P = 0.003)。而BAL图的RA较好,CPS相对于红绿图(P < 0.05)和灰色图(P < 0.001)较小。与消色差图相比,红绿色觉缺陷的个体在红绿图上的RA较差,CPS较大。结论:色度图的MRS和ACC虽然明显增高,但差异无临床意义。三个图表的MRS相似的结果证实了早期的发现,如果文本对比度足够高于阈值,MRS是相似的。红绿图和灰图的RA较低,对应的CPS较大,是由于背景亮度较低,对比度较低。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
6.90
自引率
4.50%
发文量
339
审稿时长
1 months
期刊介绍: Investigative Ophthalmology & Visual Science (IOVS), published as ready online, is a peer-reviewed academic journal of the Association for Research in Vision and Ophthalmology (ARVO). IOVS features original research, mostly pertaining to clinical and laboratory ophthalmology and vision research in general.
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