Employees debating whether to invest in voluntary vision benefits might want to stop debating and jump on the bandwagon — especially if they have teens who wear contacts.

A new Today report points out that teens have a bad record when it comes to eye infections from not taking proper care of their contact lenses. In fact, according to a study from the Centers for Disease Control and Prevention, teenagers and young adults indulge in behaviors such as poor hygiene, failure to replace lenses on schedule, and failure to replace lens cases—as well as other risky behavior such as swimming or showering with contacts in. And all of those can lead to serious eye infections, some of which can even lead to blindness.

The CDC study of more than 6,000 people aged 12 and older found that more than 80 percent of all people have at least one habit known to raise the risk of eye infections, the report says. But teens are actually not quite as bad as adults in their 20s, the CDC team finds, possibly because teens are still living at home where adults can supervise them.