Do you know how your glasses improve your vision? Find out with this video! 11/19/2016 • Polly
The first glasses appeared in Italy at the beginning of the 13th century. Today we use glasses not only as a method of eye vision correction, but also as a fashion accessory. Let's find out more about glasses, their history and the way they work!
And here are 7 little-known facts about glasses:
#1 In Africa, glasses are extremely expensive
In some African countries, average people have to spend their three months' salary to buy a pair of glasses!
#2 Most "glasses" today are actually made of plastic
Plastic makes spectacle lenses lighter and prevent them from breaking.
#3 Reading in dim light is not harmful to your eyes
Yes, it's a myth. Proper lighting only makes the process easier, but its reducing doesn't damage one's eyesight.
#4 Approximately 25% of the world's population require eyeglasses!
6 out of 10 people in the developed world wear glasses or contact lenses.
#5 The reading stone - a great-grandparent of glasses
This was a vision correction device used in 1000AD! The reading stome looked like a thin glass sphere and wasn't simple-to-use at all!
#6 People used to believe that wearing gold earrings would improve their vision
Sailors wore lots of them to have a perfect vision they needed while navigating! Today this superstition sounds super strange...
#7 Our brain can correct our vision
If you wore glasses which flipped images upside down, your brain would adapt and correct your vision in a few days, so you would see everything the right way up.
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