Scientists & Eye
East Germy (1971 SG E1372) 400th Centenary of Birth
Austria (1953 SG1247)
Johannes Kepler (1571-1630) was best known as an astronomer for his laws of planetary motion.
He also had a keen interest in optics. He demonstrated that cones of light given off by luminous
bodies were refracted and focused by the lens on the retina and that the retina was essential for 
vision. He discovered that if the point of light fell in front or behind the retina the vision becomes 
blurred and explained how spectacles can correct such ametropia..
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