“Polarized” lenses eliminate reflected glare from water snow and shiny, man-made surfaces such as metal, mirrors, windshields, and glass. If night blindness affects a driver’s ability to see, it is an important matter of safety that he or she undergo a comprehensive eye exam. ![]() Depending on the cause, treatment may include wearing specific types of glasses or contact lenses that can help support correct vision, or wearing sunglasses to protect the eyes from ultraviolet light, which can cause further eye damage. An eye exam can help reveal the cause of night blindness, which may range from glaucoma, cataracts, and nearsightedness, to vitamin A deficiency and even retinitis pigmentosa (a group of retina-damaging eye diseases). The inability to adapt to low-light conditions is the result of an underlying condition and may be accompanied by symptoms such as eye pain, blurry/cloudy vision, sensitivity to light, and/or difficulty seeing into the distance. Because many older individuals have inadequate or poorly positioned lighting in their homes, they may be sabotaging their ability to read and negotiate stairs safely.ĭespite its popular name, “night blindness” (nyctalopia) does not cause complete blindness. On the basis of these assessments, low-vision specialists can prescribe talking devices, closed-circuit TVs with enlarged lettering, or telescopes that fit onto glasses. This comprehensive approach includes evaluating response magnification and contrast enhancement, and assessing whether patients are better visual learners or auditory learners. Aside from recommending optical devices that help those with compromised vision see better, vision specialists assess which activities are most important to low-vision patients and help them further pursue them. If medications, store magnifiers, reading glasses, and/or surgery fail to improve vision that has been compromised by injury, disease, or congenital abnormality, vision rehabilitation can help those with “low vision” make the most of the vision they have left. If you are already nearsighted, second sight will make you even more nearsighted. ![]() This tendency toward nearsightedness as a cataract develops is called a “myopic shift.” While it may have other causes, people who experience significant changes in their eyeglass prescriptions over a one- to two-year period should be checked for cataract development. As a result, people who were farsighted may gradually become nearsighted, or (less commonly) vice versa. In its earliest stages, a cataract may change the consistency of the eye lens to the point where there is an alteration in its focus of light rays. The temporary change in vision known as “second sight” occurs during early cataract development when those needing corrective lenses for distance vision or reading find that they can see fine without their glasses.
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