1. Greyhounds can see the best of any other breed of dog.
2. Eyes began to develop 550 million years ago. The simplest eyes were patches of photo receptor protein in single celled animals.
3. The entire length-of all the eyelashes in their life it’s over 98 feet.
4. About 39 million people around the world that are blind.
5. 80% of vision problems worldwide are avoidable or even curable.

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