A cataract is a cloudy area in the lens of the eye that blocks the
normal passage of light through the eye.
Cataracts that begin in the centre of the lens (nuclear cataracts)
are the most common cause of worsening nearsightedness in adults. These
cataracts are more common than the kind that begin to develop in the outer part
of the lens.
Nearsightedness associated with cataracts in the centre of the lens
is often classified with the
pseudomyopias. But it is actually a permanent change
in the way light focuses in the eye. Cataract surgery corrects the myopia as
well as the cataract.
The presence of
pathological myopia may affect how cataracts are
diagnosed and treated. It may be harder to tell whether nearsightedness is
getting worse because of the cataracts or because of the progression of
pathological myopia. People with pathological myopia who have cataract surgery
are at higher risk for
ByHealthwise Staff Primary Medical ReviewerKathleen Romito, MD - Family Medicine Anne C. Poinier, MD - Internal Medicine Specialist Medical ReviewerChristopher J. Rudnisky, MD, MPH, FRCSC - Ophthalmology