Dyslexia: A Visual Approach

Carlo Aleci, MD, PhD
Department of Ophthalmology, The Gradenigo Hospital, Turin, Italy

Series: Neurology – Laboratory and Clinical Research Developments
BISAC: MED056000

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Volume 10

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Volume 2

Volume 3

Special issue: Resilience in breaking the cycle of children’s environmental health disparities
Edited by I Leslie Rubin, Robert J Geller, Abby Mutic, Benjamin A Gitterman, Nathan Mutic, Wayne Garfinkel, Claire D Coles, Kurt Martinuzzi, and Joav Merrick

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Even if the ophthalmological aspects of developmental dyslexia are generally considered negligible in comparison to the cognitive and phonological ones, a growing body of evidence suggests in many patients the presence of deficiencies related to a neuronal subpopulation along the visual pathway. Still, even in the limited area of neuro-ophtalmological research, there is no general agreement on the mechanisms underlying reading impairment and on how the aetiological element determines the phenotype, that is to say the typical symptomatology. Nevertheless, the spatial and temporal vision in dyslexics seem to be defective.

The purpose of this work is to report in a critical way the state of the art visual research in developmental dyslexia, without considering the aspects that go beyond our competence. In the second part of the treatise, the personal approach to the visuoperceptive impairment in this clinical condition is phenomenological rather than aetiological: it investigates the problem from the perceptive symptoms and signs rather than from the causal hypothesis and from the anatomofunctional demonstration.

Without claiming to exhaust the subject, we have pursued a triple aim: trying to shed light on one of the most debated and controversial questions, providing a rigorous and comprehensive overview on the current acquisitions, and, why not, offering some cues to those who intend to contribute to solve this problem. (Imprint: Nova Biomedical )

Introduction pp.i-xi

Part One. To See is not Enough for Reading: State of the Art pp.1-2

Chapter I. A Worldwide Problem pp.3-8

Chapter II. Historical Background and Morphofunctional Studies pp.9-18

Chapter III. Hormonal and Antigenic Factors pp.19-22

Chapter IV. Inheritance pp.23-28

Chapter V. The Revival of the Visuoperceptive Hypothesis pp.29-36

Chapter VI. Contrast Sensitivity and Dyslexia pp.37-48

Chapter VII. Motion Perception and Dyslexia pp.49-56

Chapter VIII. Visual Persistence and Dyslexia pp.57-60

Chapter IX. The Theory of the Deficit of the Magnocellular System: Lights and Shadows pp.61-72

Chapter X. Eye Movements and Dyslexia pp.73-102

Chapter XI. Visual Attention and Dyslexia pp.103-120

Chapter XII. The Theory of the Deficit of the Temporal Rate Processing
pp.121-132

Chapter XIII. Dyslexia and Crowding pp.133-158

Chapter XIV. One or More Dyslexias? pp.159-170

Chapter XV. Visual Rehabilitation: State of the Art and Controversies
pp.171-194

Part Two. Reading with their Eyes: A Phenomenological Approach
pp.195-196

Chapter XVI. Prelude to the Perceptive Shrinking pp.197-204

Chapter XVII. Spatial Relationship Perception and the Eidomorphometry
pp.205-216

Chapter XVIII. Spatial Relationship Perception in Dyslexia pp.217-226

Chapter XIX. Does Vertical Anisotropy Lead to a Perceptual Distortion of the Characters? pp.227-232

Chapter XX. Dialectical Suggestions pp.233-242

Chapter XXI. Advancing a Visuoperceptive-Based Classification of Developmental Dyslexia pp.243-258

Chapter XXII. Rehabilitating Spatial Relationship Perceptions. Avant-gardes and Working Hypotheses pp.259-262

Conclusion pp.263-270

References pp.271-274

Epilogue pp.275-276

Appendices pp.277-322

Index pp.323-333

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