The term low vision refers to a person having 20/70 vision or worse. When a person's vision is this bad, vision aids like contact lenses and prescriptions lenses are not enough to restore the patient's vision. People who need low vision treatments are typically partially sighted – which means their vision is between 20/70 to 20/200 when using corrective lenses. People with vision worse than 20/200 with corrective lenses are considered legally blind.
Optometrists can easily spot low vision during an eye exam. A patient with 20/70 vision or worse will have a hard time reading letters off a Snellen chart. Low vision is a medical term that refers to a person's sight being 20/70 or worse. Many patients cannot correct low vision completely by using prescription glasses or contact lenses. Patients with low vision can be either partially sighted, or legally blind. Fortunately, there are a few treatments that can improve the quality of life of people with low vision.
Low vision can be caused by a variety of eye conditions and diseases. Some of the more common culprits include:
Given the vast variety of eye disorders and health conditions that can lead to low vision, the treatment options the optometrist typically recommends are those that address the cause of the patient's poor eyesight. These include:
While low vision can be a permanent condition, there are many treatments and aids that allow the patient to still enjoy a good quality of life.
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