20/20 In Hindsight: The Snellen Eye Chart
Have you ever wondered where that chart with the big E in every eye doctor’s office came from?
Have you ever wondered where that chart with the big E in every eye doctor’s office came from?
Have you ever wondered just what sunglasses do for your eyes, and how? It’s a little more complex than just dropping a dark filter over your vision.
With so many vitamins available to us, it’s hard to know which ones you really need to keep an eye out for!