Low vision is insufficient vision, despite wearing the best possible corrective lenses or contact lenses or in other words, to be unable to do the things you want to do.
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Vision loss that cannot be corrected by ordinary glasses, contact lenses, medication or surgery is called “low vision.”
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Low vision is the vision which interferes with the daily performance of the individual.
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Low vision refers to a significant reduction of visual function that cannot be corrected to normal range by ordinary glasses, contact lens, medical treatment or surgery.
The following is the World Health Organization’s definition of low vision. This is widely-used internationally.
A person with low vision is one who has impairment of visual functioning even after: treatment, for example an operation and/or standard refractive correction (has been given glasses or lenses) and has a visual acuity of less than 6/18 to light perception, or a visual field of less than 10°from the point of fixation (i.e. 20° across) but who uses, or is potentially able to use, vision for the planning and/or execution (doing it!) of a task.
It is important to note that if a person’s vision improves with contact lenses or spectacles to better than 6/18 may not be considered to have low vision. However, low vision criteria only follows when the best-corrected visual acuity is less than 6 /18.
A low vision person is one with visual acuity of 6/18 or less in the better eye even after the best possible correction.
If one has low vision, also known as partial sight, it’s important to maximize the vision one has.
The low vision services are provided by specially trained optometrists and ophthalmologists and include a thorough eye examination, an evaluation of remaining vision and the prescription of optical devices/non optical device, such as high-powered spectacles and magnifiers, to enhance the images that one can see.
OPTOMETRY-SHARP VISION
Optometrist