3. The muscles that control your eyes are the most active muscles in your body. 4. Concentrated at the outer edges of the retina, rod cells are involved in peripheral vision. They are far more ...

Learn about the anatomy of your eyes and how each part of the eye works in order to create visual output. Does your baby really need an eye exam in their first year? Absolutely. The smaller and ...

Have you ever wondered how your eyes work? What's really happening when you see something? Of course, you can only see something when there's light. And what is light? It's energy that zooms ...

Human eyes can’t decipher individual pixels from far away—this video shows why. A version of this story appears in the October 2018 issue of National Geographic magazine. Short for “picture ...

Your eyes may be suffering at work (and you might not know it) We often spend long hours in front of a computer, smartphone or tablet when we're working. This overexposure puts significant ...

If problems don’t go away, tell your eye doctor. Some activities may call for special glasses: Computer work: Once you hit 40, it’s easy to get eyestrain. It can come from long hours staring ...

So, how can you protect your eyes and relieve work-related eye strain? Experts recommend applying the 20-20-20 rule: every 20 minutes, take a break for 20 seconds by looking at an object at least ...