Low Vision Aids (LVAs): Classification, Indications and Advantages

Low Vision Aids (LVAs) Low vision is defined as a visual impairment that cannot be corrected fully with glasses, contact lenses, medication, or surgery, and that interferes with daily activities. Low vision aids help patients maximize their residual vision. Classification of Low Vision Aids 1. Optical Aids These devices use lenses to enhance vision by magnifying images. a) For Distance Vision Telescopes: Types: Handheld, spectacle-mounted (bioptic or full diameter) Usage: Watching television, classroom board reading, street signs. Magnification: Usually 2x to 8x Disadvantages: Narrow field of view, difficulty with mobility. b) For Near Vision Magnifying Reading Glasses: Higher power lenses than standard reading glasses. Hand-held Magnifiers: Portable, with or without built-in lights. Stand Magnifiers: Rest on the reading material; useful for patients with tremors. Bar Magnifiers: Magnify one line of text at a time. High-Add Spectacle Lenses: Strong reading glasses requiring close working distance. 2. …