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11 Impossibly Cool Facts You May Not Know About Your Eyes

Your eyes are rad. Enhance their beauty (in the subtlest of ways) with a little help from 1-DAY ACUVUE® DEFINE™ Brand Contact Lenses. Click for Important Safety Information.

1. The eye muscle is the fastest reacting muscle in your entire body — it contracts in less than 1/100th of a second!

2. The first eyes ever to exist were likely a couple of eyespots only able to distinguish between light and dark.

3. If you had been born with different-colored eyes, you'd be completely heterochromatic.

4. There are approximately seven million cones and 130 million rods in your retina that respond to light.

5. Around 6,000 to 10,000 years ago, everybody had brown eyes, and then the first blue-eyed person was born.

6. Your eyes can see around 10 million different colors...

7. ...but if you were part of that 1% of women with a rare genetic mutation, you'd be able to see 100 million colors.

8. Your whole family — and your significant other's — may consist of brown-eyed people, yet you could still have a blue-eyed baby.

9. Your eye color doesn't set until you turn two.

10. Feel free to reward your eyes with a trip to a beautiful rose garden, because your eye muscles are always working, like, really, really hard.

11. According to studies, defined limbal rings can make you appear more attractive.

Oh, and super-fun fact? 1-DAY ACUVUE® DEFINE™ Brand Contact Lenses provide a defining outline around your iris to amplify contrast — for beautiful eyes that pop!

Important information for contact lens wearers: 1-DAY ACUVUE® DEFINE™ Brand Contact Lenses are available with and without vision correction. An eye care professional will determine whether contact lenses are right for you. Although rare, serious eye problems can develop while wearing contact lenses. To help avoid these problems, follow the wear and replacement schedule and the lens care instructions provided by your eye doctor. Do not wear contact lenses if you have an eye infection, or experience eye discomfort, excessive tearing, vision changes, redness or other eye problems. If one of these conditions occurs, remove the lens and contact your eye doctor immediately. You should never share your lenses with anyone else. For more information on proper wear, care and safety, talk to your eye care professional and ask for a Patient Instruction Guide, call 1-800-843-2020 or visit