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What is the secret that Kepler debunked for the first time in Germany that wearing glasses can help eyesight?
Johannes Kepler.

The invention and development of glasses is practice before theory. The theory of glasses correcting vision was gradually established later. 1604, German astronomer johannes kepler published a paper on the imaging principle of convex lens and concave lens, revealing why convex lens can correct hyperopia and concave lens can correct myopia. The theory of lens optics has played a guiding role in the later development of glasses.

Kepler discovered three laws of planetary motion, namely, orbit law, area law and periodicity law. These three laws can be described as follows: all planets run in elliptical orbits of different sizes; At the same time, the area swept by the planet in the radial direction on the orbital plane is equal; The square of the planet period of revolution is proportional to the cube of its distance from the sun. These three laws finally won him the reputation of "sky legislator". At the same time, he also made important contributions to optics and mathematics. He is the founder of modern experimental optics.