Visual impairment includes both low vision and blindness. In developing countries, major causes of blindness are corneal scarring because of vitamin A deficiency, congenital rubella, ophthalmic neonatorum, and so on. Hospitals, vision rehabilitation organizations, and private optometric and ophthalmic practices provide comprehensive low vision services. In central field loss, different visual functions affected are visual fields, distance and near visual acuity, and contrast sensitivity. Management of overall blurred vision includes eccentric viewing training, magnification, contrast enhancing measures, and glare comfort devices. Condition causing PFL rarely cause glare except diseases, such as glaucoma, lasered diabetic retinopathy, and so on. For near, there are mainly three types of optical LVDs, such as spectacle magnifier, stand magnifier, and hand-held magnifier. A stand magnifier is a convex lens, where both angular magnification and relative distance magnification is used. Electronic low vision devices are electronic optical systems that make the object appear larger. The principle of projection magnification is used here. Use of tinted glasses, filters, and visors provide great comfort in situations of glaucoma, albinism, and rod cone monochromatism. When vision is affected, the loss is compensated using other residual senses. Some of the sensory substitution devices are audio books, and Braille. Notex, needle threader, color identifier, and talking clock and watch are discussed.