For those of you who think you know your eyes pretty well, how many times did you blink while reading this question? Go ahead and read it again if you need to. We’ll wait. … OK, we’ll give you an easier one. What are your tears made of? You’re not sure about that one either? Well, no worries. You’ll see those two random facts about eyes explained below, along with several other bits of information regarding those two priceless oval-shaped things to the left and right of your glabella.

22 Random Facts about Eyes

1. Newborns don’t produce tears until they are at least 4 weeks old.

2. In general, more than 60 percent of the population uses corrective lenses.

3. More than 90 percent of people in their 50s or older require corrective lenses.

4. Tears consist of water, electrolytes, proteins, lipids, and mucins.

5. The space between your eyebrows is called the glabella.

6. The average person has more than 500 hairs in their eyelashes. The upper lid of each eye has about 175 hairs, and the lower lid has between 75 and 100 hairs.

7. You lose one to five eyelashes per day. Within 150 days, all of your eyelashes will have fallen out and replenished themselves.

8. Your eyes can see 500 shades of gray.

9. Most people blink every four seconds, or 15 times per minute.

10. Your eyes can get sunburned. That’s one reason why we have sunglasses here for you.

11. Unlike the rest of your body, your eyes continue to move during the REM stage of the sleep cycle. Could it be because they’re following the images in your dreams?

12. A baby’s eyes start to develop just two weeks after conception. A fetus’s eyes are basically fully formed by month six, although the eye color, size, or shape might change after birth and during the individual’s lifetime.

13. The eye is the fastest muscle in your body.

14. The most common eye color in the world is brown.

15. Your nose runs when you cry because your tears drain into it.

16. Ommatophobia is the fear of eyes.

17. Your retinas see the world upside-down. Your brain flips the image.

18. Colorblindness is more common for men than for women.

19. If you cross your eyes, they won’t stay that way, no matter what your mom said.

20. A human eyeball weighs about one ounce and is 24 millimeters wide. That means it’s 3 millimeters smaller than a gumball but weighs three times as much.

21. Your pupils dilate when you’re looking at someone you’re attracted to, so you probably can’t hide the truth even if you want to.

22. Babies have good color vision and decent depth perception by five months of age.

If You Want to Know More

If any of these random facts about eyes caused concern rather than the lighthearted lift of an eyebrow, consider making an appointment for an eye exam in Oxford, Lapeer, Fenton, Flint, or Grand Blanc. We’ll help answer both your serious and fun questions as well as give you or your child a thorough eye examination.

See our blog page to learn more about eye care treatment, eye disease prevention, contact lens use, eyeglass prescriptions, and more.