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A Critique of Behavioural Vision Therapy Techniques for Children with Reading Difficulties Including Dyslexia
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Maree Flaherty; Jessica Crippa; Irina Sim; Manjushree Bhate; Chian Chiang Nicholas Chow; Deepa Taranath; Glen Gole – Australian Journal of Learning Difficulties, 2024
Specific learning disabilities affect the brain's ability to process verbal and non-verbal information efficiently and accurately. The most common learning disability is reading disability which includes dyslexia. Evidence supports that dyslexia is a language-based disorder. The core deficit of dyslexia is the phonological component of language…
Descriptors: Dyslexia, Learning Disabilities, Reading Difficulties, Perceptual Impairments
Visual Memory for Objects Following Foveal Vision Loss
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Geringswald, Franziska; Herbik, Anne; Hofmüller, Wolfram; Hoffmann, Michael B.; Pollmann, Stefan – Journal of Experimental Psychology: Learning, Memory, and Cognition, 2015
Allocation of visual attention is crucial for encoding items into visual long-term memory. In free vision, attention is closely linked to the center of gaze, raising the question whether foveal vision loss entails suboptimal deployment of attention and subsequent impairment of object encoding. To investigate this question, we examined visual…
Descriptors: Visual Perception, Attention, Cognitive Processes, Long Term Memory
Preferred Retinal Loci Relationship to Macular Scotomas: A 10-Year Comparison
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Schoessow, Kimberly A.; Fletcher, Donald C.; Schuchard, Ronald A. – Journal of Visual Impairment & Blindness, 2012
Age-related maculopathy is the leading cause of vision loss among adults in developed countries, and its prevalence is expected to double over the next decade. The two forms of age-related maculopathy--exudative and nonexudative--are capable of affecting the macula, with potential symptoms including decreased contrast sensitivity, decreased visual…
Descriptors: Visual Impairments, Visual Acuity, Eye Movements, Rehabilitation
The Role of the Magnocellular Visual Pathway in the Attentional Blink
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Stuart, Geoffrey W.; Lambeth, Sandra E.; Day, Ross H.; Gould, Ian C.; Castles, Anne E. – Brain and Cognition, 2012
Visual attention has temporal limitations. In the attentional blink (AB) a stream of stimuli such as letters or digits are presented to a participant on a computer monitor at a rapid rate. Embedded in the stream are two targets that the participant must try to identify. Identification of the second target is severely impaired if it is presented…
Descriptors: Stimuli, Visual Impairments, Attention, Earth Science
Parafoveal Processing during Reading is Reduced across a Morphological Boundary
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Drieghe, Denis; Pollatsek, Alexander; Juhasz, Barbara J.; Rayner, Keith – Cognition, 2010
A boundary change manipulation was implemented within a monomorphemic word (e.g., "fountaom" as a preview for "fountain"), where parallel processing should occur given adequate visual acuity, and within an unspaced compound ("bathroan" as a preview for "bathroom"), where some serial processing of the constituents is likely. Consistent with that…
Descriptors: Visual Impairments, Visual Acuity, Morphemes, Word Recognition
Low Vision Rehabilitation Intervention for People with Ring Scotomas
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Schoessow, Kimberly A.; Gilbert, Leah M.; Jackson, Mary Lou – Journal of Visual Impairment & Blindness, 2010
Central scotomas--areas of the nonseeing retina within the central 20 degrees of the visual field--are present in approximately 90% of vision rehabilitation patients. They vary in size and shape and can be small or large, symmetrical or asymmetrical, round or irregularly shaped. Most central scotomas border fixation on one side and can be overcome…
Descriptors: Intervention, Partial Vision, Vision, Patients
Phenotypical Characteristics of Idiopathic Infantile Nystagmus with and without Mutations in "FRMD7"
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Thomas, Shery; Proudlock, Frank A.; Sarvananthan, Nagini; Roberts, Eryl O.; Awan, Musarat; McLean, Rebecca; Surendran, Mylvaganam; Kumar, A. S. Anil; Farooq, Shegufta J.; Degg, Chris; Gale, Richard P.; Reinecke, Robert D.; Woodruff, Geoffrey; Langmann, Andrea; Lindner, Susanne; Jain, Sunila; Tarpey, Patrick; Raymond, F. Lucy; Gottlob, Irene – Brain, 2008
Idiopathic infantile nystagmus (IIN) consists of involuntary oscillations of the eyes. The familial form is most commonly X-linked. We recently found mutations in a novel gene "FRMD7" (Xq26.2), which provided an opportunity to investigate a genetically defined and homogeneous group of patients with nystagmus. We compared clinical features and eye…
Descriptors: Visual Impairments, Eye Movements, Visual Acuity, Depth Perception
Cerebellar Ataxia with Bilateral Vestibulopathy: Description of a Syndrome and Its Characteristic Clinical Sign
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Migliaccio, Americo A.; Halmagyi, G. Michael; McGarvie, Leigh A.; Cremer, Phillip D. – Brain, 2004
We report four patients with the syndrome of cerebellar ataxia with bilateral vestibulopathy (CABV) and, using search coil oculography, we validate its characteristic clinical sign, namely impairment of the visually enhanced vestibulo-ocular reflex (VVOR) or doll's head reflex. In our four patients, CABV began in the sixth decade of life; they are…
Descriptors: Human Body, Eye Movements, Neurological Impairments, Kinesthetic Perception