 This is Housecall for Health. June is Cataract Awareness Month. According to the American Society of Cataract and Refractive Surgery, it's the leading cause of blindness worldwide, but can be treated with surgery, one of the most common elective procedures in the U.S. The organization describing a cataract as a part of the natural aging process as cells in the lens begin to clump together more and more. Over time, this becomes an increasingly visually significant cataract.