Pathological myopia is a rare form of nearsightedness in which the
back of the eyeball continues to grow longer after reaching normal adult size.
It causes very rapid changes in vision, often requiring a change in eyeglass or
contact lens prescriptions every 4 to 6 months.
The cause of pathological myopia is not clear. The condition is
usually progressive. It does not stabilize within normal limits and causes
gradual breakdown and thinning of tissues at the back of the eye and the growth
of new blood vessels under the retina that may cause serious complications and
loss of vision.
Most people who have severe nearsightedness (more than 6 to 8
diopters) have some degree of retinal changes. But not everyone who has severe
nearsightedness has pathological myopia.
June 11, 2013
Kathleen Romito, MD - Family Medicine & Christopher J. Rudnisky, MD, MPH, FRCSC - Ophthalmology
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