1. Vision is so important to humans that almost half of your brain’s capacity is dedicated to visual perception.

2. The most active muscles in your body are the muscles that move your eyes.

3. The surface tissue of your cornea (the...

Sunglasses are more than just a fashion statement - they’re important protection from the hazards of UV light.

If you wear are sunglasses mostly for fashion that’s great, just make sure the lenses block UVA and UVB rays.

And if you don’t...