Cataracts – Symptoms. http://www.webmd.com/eye-health/cataracts/cataracts-symptoms [2013, January 30].
Cataracts - What Increases Your Risk. http://www.webmd.com/eye-health/cataracts/cataracts-what-increases-your-risk [2013, January 30].
Prevention. http://www.webmd.com/healthy-aging/guide/cataracts-prevention [2013, January 30].