TED

Todays TED video talked about John silver who was a man that had poor vision and seeked out to find a pair of glasses that fit him. HE found out that many people needed glass4es but there weren't a lot of optometrists in the world so not everyone can get the glasses they need. John silver made a special pair of glasses that you could adjust to your liking and he said he would sell these glasses so everyone can get glasses because in Russia there is only 1 optometrist for every 8 million people so imagine how hard that would be for the optometrist.
THEND