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What is legal blindness?
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In the United States, the diagnosis of legal blindness is:
- Visual acuity 20/200 or worse with corrective lenses in the better seeing eye, or
- Visual field restricted to 20 degrees or less in the better eye.
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What conditions cause Low Vision?
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There can be many factors that lead to low vision. The most common conditions are:
- Age-Related Macular Degeneration
- Glaucoma
- Diabetic Retinopathy
- Retinitis Pigmentosa
- Ocular Albinism
- Trauma
- Stroke
- Retinal Detachment
- Corneal Disease
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Can low vision be cured?
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Typically, the conditions that cause low vision produce permanent vision loss. The purpose of low vision rehabilitation is to maximize the potential visual performance, to help people get through day-to-day tasks and to help maintain independence.
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What is a CCTV?
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CCTV stands for closed-circuit television. Closed circuit video magnification systems are capable of very high levels of magnification and can manipulate the brightness and contrast of the image. CCTVs can be large and stationary or smaller and portable. There is no degradation of images with extreme magnification, however, the higher the magnification, the smaller the field of view. CCTV is often used when optical devices such as spectacles and magnifiers are not strong enough or not accepted.
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