Women who took extra vitamin C for 10 years or longer had even greater risk.
Researchers say the cataract risk is only present with supplements.
This study is published in the American Journal of Clinical Nutrition.
Vitamin C supplements linked to cataracts
December 17, 2009 Doctors studied nearly 240,000 women for more than eight years.
Those who took 1,000 milligrams of vitamin C on a regular basis or occasionally were about 25 percent more likely to have age-related cataracts removed.
