Effect of Pattern Glare and Colored Overlays on a Simulated-Reading Task in Dyslexics and Normal Readers
| Autor: | Neville Drasdo, Bruce J. W. Evans, Ian L. Richards, Anna Cook |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Adult
Male medicine.medical_specialty genetic structures Vision Disorders Sensory Aid Audiology Developmental psychology Contrast Sensitivity Dyslexia Visual processing Communication disorder medicine Humans Language disorder Scotopic sensitivity Child Lenses Visual search medicine.disease eye diseases Ophthalmology Reading Colored Sensory Aids Female Asthenopia sense organs Psychology Optometry |
| Zdroj: | Optometry and Vision Science. 71:619-628 |
| ISSN: | 1040-5488 |
| DOI: | 10.1097/00006324-199410000-00004 |
| Popis: | Scotopic sensitivity syndrome or the Irlen syndrome describes symptoms of asthenopia anamolous visual performance experienced while reading that are lessened by colored filters. One putative explantation 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. |
| Databáze: | OpenAIRE |
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