Myopia or nearsightedness is one of the most common causes of impaired vision. In fact, by 2050 research suggests that nearly half the people on this planet will be myopic. People who have nearsightedness can see close-up objects clearly while distant objects appear blurry. That means that while you may not struggle to read a book or look at a menu, you may struggle to see things farther away like a road sign on the highway. Nearsightedness can affect both adults and children. It is often discovered in children when they are between the ages of 8 and 12. But, myopia can also occur in adults. Typical symptoms of undiagnosed myopia include difficulty seeing things in the distance, as well as squinting.