Considering it's a marvel of design, the human eye doesn't get a lot of respect. We wake up, we see (often with help from glasses or contacts) and move on with our lives. Most of us take our sight for granted and see an eye specialist every few years or so.
But there's a good chance some of us skip that check-up.
About half of the estimated 61 million adults in the United States who are at high risk for serious vision loss haven't visited an ophthalmologist in the past 12 months, according to the Centers for Disease Control and Prevention. About 35 percent of adults don't see an eye doc because their vision is A-OK and they don't think an exam is necessary.