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Comparison of Irlen scotopic sensitivity syndrome test results to school and visual performance data

1 December 1992


Recently, lrlen developed the theory that many people with reading problems have a condition called scotopic sensitivity syndrome (SSS) which can be treated with colored overlays or lenses. To investigate this theory, 39 children with known reading and academic abilities were tested for SSS and were prescribed colored overlays. The children were also given complete optometric examinations. Results showed no clear associations between reading abil ity and SSS classification, nor between the color of overlay prescribed and SSS, academic, or optometric findings. There was, however, a relatively strong tendency for poor readers to have both SSS and optometric problems suggesting the simultaneous existence of both these problems can make reading very difficult.


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