low vision

low vision

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Samuel N. Markowitz, MD, FRCS(C), Associate Professor of Ophthalmology, Faculty of Medicine, University of Toronto; Director, Low Vision Rehabilitation Program, Department of Ophthalmology, University of Toronto; Staff, Toronto Western Hospital, University Health Network, Toronto, ON.

Low vision can result from loss of macular function, with loss of peripheral vision or from loss of hemi-fields of vision such as in cases with stroke. Low vision rehabilitation (LVR) is the continuation of care after all other means for restoration of vision were used and failed. Modern LVR is a multidisciplinary endeavour responsible for providing assessment, prescribing devices, and conducting training sessions for individuals with low vision. Ontario recognizes the diverse needs of individuals requiring LVR interventions, covers LVR assessments and LVR training sessions, and provides financial subsidies for the purchase of low vision devices.
Key words: low vision rehabilitation, low vision, age-related macular degeneration, assistive devices, vision therapy.

Sohel Somani, MD, Senior Resident, Department of Ophthalmology, University of Toronto, Toronto, ON.

Age-related macular degeneration (ARMD) is a progressive disease affecting the central vision of patients older than 55 years. Typically, ARMD patients are classified into dry and wet forms based on clinical characteristics. This has important implications with respect to their clinical presentation, prognosis and management options. Important risk factors in the progression of disease include age, smoking and drusen characteristics. The promising results of a new study on vitamin supplementation provide direction for treatment and prevention, as well as the understanding of the role of antioxidants in ARMD pathogenesis. High-dose vitamins (beta- carotene, vitamins C and E and zinc) should be considered in certain patients with ARMD.
Key words: macular degeneration, vitamins, low vision, supplementation, Amsler grid.

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