EFFECT OF PATTERN GLARE AND COLORED OVERLAYS ON A SIMULATED-READING TASK IN DYSLEXICS AND NORMAL READERS

被引：25

作者：

EVANS, BJW

COOK, A

RICHARDS, IL

DRASDO, N

机构：

[1] Department of Vision Sciences, Aston University, Birmingham, Aston Triangle

[2] Department of Applied Psychology, Aston University, Birmingham, Aston Triangle

来源：

OPTOMETRY AND VISION SCIENCE | 1994年 / 71卷 / 10期

关键词：

DYSLEXIA; IRLEN; COLORED FILTERS; TINTED LENSES; VISION; CONTRAST SENSITIVITY; FLICKER;

D O I：

10.1097/00006324-199410000-00004

中图分类号：

R77 [眼科学];

学科分类号：

100212 ;

摘要：

Scotopic sensitivity syndrome or the Irlen syndrome describes symptoms of asthenopia and anomalous visual performance experienced while reading that are lessened by colored filters. One putative explanation for this condition relates to pattern glare: a hypersensitivity to repetitive patterns, including lines of print on a page. Experiment 1 used a placebo-controlled paradigm to investigate the effect of pattern glare and colored overlays on performance at a simulated reading visual search task. Despite the fact that the subjects were university students, the results showed a tendency, of border-line significance, to support the conclusion that colored filters seem to improve reading through ameliorating pattern glare. In experiment 2 we compared the prevalence of pattern glare in matched groups of dyslexic children and good readers. The dyslexic group reported more pattern glare, but also reported more glare from a control stimulus. Pattern glare in the dyslexic group was directly correlated with flicker sensitivity. The results are related to recent research on visual processing and ocular-motor function in dyslexia.

引用

页码：619 / 628

页数：10

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