The Mayans, the Egyptians, the Chinese and the Greeks were all great cultures that made incredible accomplishments thousands of years ago. Yet when it came to maintaining vision, even the greatest scholars proved helpless. Back then, just like today, it was common for human eyes to weaken as people aged.
The great Roman orator Cicero complained about how bothersome it was for him to have to have slaves read out texts. Emperor Nero watched his beloved gladiator battles through an emerald. Greek philosopher Ptolemy (around 150 A.D.) was familiar with the first laws of light refraction, but it wasn’t until more than 1,000 years later that Arab mathematician and astronomer Alhazen identified the law of refraction that was essential to good vision.
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