Can myopia lead to blindness?
In extreme circumstances, myopia (shortsightedness) can lead to serious, vision-threatening complications, including blindness. However, this is rare and occurs primarily in cases where high myopia has reached an advanced stage called degenerative myopia (or pathological myopia).
Myopia occurs when the eyeball grows too long during childhood. This causes light entering the eye to focus short of the light-sensitive retina at the back of the eye instead of directly on the retina. The result is blurry distance vision, although certain close-up vision remains clear.
Mild myopia usually does not increase a person's of risk developing serious eye problems. Vision problems caused by myopia usually are fully corrected with corrective lenses (glasses and/or contact lenses) or laser eye surgery.
If shortsightedness progresses to the more advanced level of high myopia, complications like glaucoma, cataracts and retinal detachment may occur. The potential seriousness of this condition is reflected in its name: pathological myopia or degenerative myopia.
A detached retina is a very serious threat to a person's vision, and a recent study concluded that more than half of all retinal detachments are attributable to myopia, not trauma.
The scenario is as follows: As the eyeball stretches and elongates, the retina stretches right along with it. The retina thins enough for a tear or hole to develop , allowing fluid to penetrate beneath it. As this fluid builds up, pressure increases until it separates the retina from its underlying support tissues.
Symptoms of a detached retina include light flashes, floaters, blurred vision and a shadow across the field of vision. A detachment is a serious and sight-threatening event that should be brought to the attention of an optometrist or ophthalmologist immediately.
If it’s been more than two years since your last eye test, schedule one today with an optometrist near you.
Page updated June 2020