Visual Function in Developmental Dyslexia: Opthalmological and Neuropsychological Results
Pache M.1, Weber P.2, Klumpp S.1, Kaiser H. J.1
University Eye Hospital Basel, Dept. for Neuroophthalmology and Orthoptics, Basel, Switzerland; 2University Paedriatric Hospital, Basel, Dept. for Neuropaediatrics, Basel, Switzerland
Purpose: We aimed to perform an ophthalmological and orthoptical screening in children with developmental dyslexia, and to test the children for possible alterations of their spatial and visuoperceptual ability.
Method: A total of 31 children with developmental dyslexia were included in the study (M:W = 22:9, mean age 10.8 ± 2.1 years). All patients underwent a complete ophthalmological and orthoptical examination. Neuropsychological testing was performed using the Visual Object and Space Perception Battery (VOSP), which comprises a screening test and eight tests each designed to assess a particular aspect of object or space perception, while minimizing the involvement of other cognitive and practical skills. Even though the VOSP is well validated and standardized for adults, no normal values for children exist thus far. Therefore, we also tested a sex-age-matched control group (M:W = 22:9, mean age 10.7 ± 2.2 years).
Results: One child was excluded from the study because of decreased visual acuity. All other children presented normal ophthalmological and orthoptical findings. Performance in the VOSP-subtests progressive silhouettes test' and number loc
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