The test-retest reliability of colored filter testing in relation to two symptom levels of dyslexia was evaluated using a forced-choice test procedure. Two tests, separated by two weeks, were conducted with 41 participants (ages 15 to 17). Results indicated poor test-retest reliability. (Author/DB)

This study examined relationships among lens color, visual grating, visual detection task performance, and peripheral retinal brightness thresholds among four adults and four children with reading disabilities and age-matched controls. Subjects with reading disabilities displayed significantly lower contrast sensitivity when tested with sine-wave…

The study compared the effectiveness of Irlen filters and traditional optometric intervention with 30 volunteers (ages 9-51). Pre- and posttesting revealed that subjects in both treatment groups were more comfortable after treatment, that only the vision therapy group showed improved visual functioning, and that the Irlen filter group did not show…

The study examined the effectiveness of the use of nonoptical tinted (Irlen) lenses with 44 children (ages 9-16) with reading disabilities. Evaluation after 6 and 12 months indicated a significant improvement in attitude to school and to basic academic skills. Reading comprehension and accuracy, but not rate, were also significantly improved.…