So take the Brock String test to see how good your two-eyed vision is. And if you end up being in the 16 percent of people affected by a binocular vision problem, make the time to see your ...

Repeat the exercise according to a doctor’s instructions. A person can either use a Brock string or make their own. A Brock string is a white string that is about 15 feet long and has colorful ...