Low vision causes, magnification device options, and visual rehabilitation strategy concepts tested on the NBEO.
30 cards · basic cards · AI-written, checked twice. Edit anything.
- What is low vision?
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Visual impairment that cannot be fully corrected with glasses, contact lenses, medication, or surgery and interferes with daily activities- What is a commonly used definition of legal blindness in low vision practice?
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Best-corrected visual acuity of 20/200 or worse in the better eye, or a visual field of 20 degrees or less- What are the most common causes of low vision in older adults in developed countries?
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Age-related macular degeneration, glaucoma, diabetic retinopathy, and cataracts- What is the goal of low vision rehabilitation?
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To maximize a patient's remaining functional vision to improve independence in daily activities- What is relative distance magnification?
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Bringing an object closer to the eye to increase its retinal image size- What is relative size magnification?
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Increasing the actual physical size of an object or text to make it easier to see- What is angular magnification?
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Using an optical device, such as a telescope, to increase the apparent size of a distant object- What is a hand magnifier commonly used for in low vision care?
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Providing portable magnification for short-term near tasks such as reading labels- What is a stand magnifier's main advantage over a hand magnifier?
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It maintains a fixed, consistent working distance from the reading material, reducing hand tremor issues- What is a video magnifier (CCTV)?
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An electronic device that uses a camera and screen to enlarge printed material for reading- What is a telescope used for in low vision rehabilitation?
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Magnifying distant objects, such as for reading signs or watching television- What is an eccentric viewing technique used to teach patients with central vision loss?
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Using a functioning area of peripheral retina to view objects instead of the damaged central macula- What is a preferred retinal locus (PRL)?
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An area of peripheral retina that a patient with central vision loss adopts as a substitute fixation point- What is contrast enhancement used for in low vision rehabilitation?
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Improving the visibility of objects and text by increasing the difference in brightness or color between them and their background- What lighting modification is commonly recommended for patients with low vision from macular degeneration?
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Increased, well-directed task lighting to improve contrast and reduce glare
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