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What Causes Keratoconus?
Often the cause of keratoconus is unknown. Some studies have
found that keratoconus runs in families, and that it happens
more often in people with certain medical conditions. But most
often, there is no eye injury or disease that could explain why
the eye starts to change.
Keratoconus usually begins in the teenage years, but it can
also start in childhood or up to about age 30. The changes in
the shape of the cornea occur slowly, usually over several
Someone with keratoconus will notice that vision slowly
becomes distorted. The change can stop at any time, or it can
continue for several years. In most people who have keratoconus,
both eyes are eventually affected.