I’ve been reading about the history of glasses today, and I came across the most interesting article on the use of bifocals in the animal world.

It’s kind of surprising to me that eyeglasses are nearly 800 years old in the West. Invented sometime in the 13th century, they’ve become a necessary part of life for many of us in the computer age. Interestingly enough, before their invention, the use of reading stones was fairly common in the Middle Ages (I guess before these came along you just squinted). Not much happened between the invention of glasses aside from significant improvements in optics and changes in style until Benjamin Franklin came along.