OK, be honest here: If you wear contact lenses, when was the last time you replaced the lens storage case? Has it been longer than 90 days? And do you ever wear your contact lenses while taking a shower?

It may surprise you to know that these are just a few of the risky contact lens habits that can increase your chances of getting an infection or other serious eye problem.

Before you pop another lens into your eyes, read on to learn how best to protect your peepers.

We love our contact lenses. Talk about freedom—they make seeing the world in 20/20 vision comfortable and convenient.

But contact lenses do come with some risks, especially if you don't wear them as directed or care for them properly.

These risks can include an eye infection called microbial keratitis and corneal ulcers (open sores on the eye's surface). In extreme cases, serious eye problems from contact lenses can lead to blindness.

To help keep your eyes healthy, follow these tips for contact lens care and use:

Clean your lenses properly. Rinse and rub your lenses as directed by your eye doctor.

Don't wear your contact lenses while sleeping. This is a big no-no unless your doctor says it's OK.

Always use fresh lens solution in your lenses storage case. Never add fresh solution to old solution to top it off. And never reuse the solution.

Remove your lenses before showering, swimming or using a hot tub. And never use water to clean or store your lenses. Even tap water may harbor infection-causing germs. Contact lenses make it easier for these germs to enter your eyes.

Replace as directed. Don't wear or use your lenses for longer than recommended.

Store lenses safely. Change your contact lens storage case every three months—or sooner if your doctor tells you to.

Sources: Centers for Disease Control and Prevention; U.S. Food and Drug Administration