No one wants to find out that their vision is declining, but there are some signs you just can’t ignore. Here’s how to know if you need glasses or contacts. According to The Vision Council research, nearly 3 out of every 4 adults in the U.S. wear some type of vision correction. That’s 188.7 million Americans. About 159.2 million American adults wear prescription glasses while 22-25 million adolescents under 18 wear glasses. The number of people who wear corrective eyewear continues to rise: From 2014 to 2015, the number of