Dyslexia as a result of impaired visual processing while reading
https://doi.org/10.26907/2541-7738.2025.4.64-76
Abstract
The process of visual perception and text analysis during reading, from the eye’s optics and its defects that are sufficient to impair letter discrimination, was explored. Visual processing was examined at the levels of visual attention and eye movements, with particular focus on the control of both saccadic and vergence eye movements in the binocular fixation on a text line. At the cortical level, the functions of dorsal and ventral streams, along with the consequences of dorsal stream dysfunction for letter recognition, were described. The findings demonstrate how visual impairments at any of these levels may interfere with reading ability and contribute to dyslexia. Existing visual theories of dyslexia were discussed, including the author’s theory of asymmetrical interaction between the cerebral hemispheres in visual recognition and the dominance of gestalt perception. The need to integrate the visual and phonological approaches to dyslexia research was emphasized.
About the Author
O. V. Levashov
Brain&Body Development Centre
Viet Nam
Viet Nam
Oleg V. Levashov, Cand. Sci. (Biology), Associate Professor, Academic Director
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For citations:
Levashov O.V. Dyslexia as a result of impaired visual processing while reading. Kazan Journal of Historical, Linguistic, and Legal Research. 2025;167(4):64-76. (In Russ.) https://doi.org/10.26907/2541-7738.2025.4.64-76
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