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around 1284 Italian, Salvino D'Armate is credited with inventing the first wearable eye glasses.
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Two Dutch eye glass makers, Zaccharias Janssen and son Hans Janssen did exoeriments with several lenses placed in a tube. The Janssens observed that viewed objects in front of the tube appeared greatly enlarged, creating both the forerunner of the compound microscope and the telescope.
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Galileo Galilei develops a compound microscope with a convex and a concave lens.
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The english physicist, robert hooke looked at a small peice of cork through a microscope and noticed some "cells" in it
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Anton van Leeuwenhoek built a simple microscope with only one lens to examine blood, yeast, insects and lots of other tiny objects.
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Edward jenner was a scientist who dicovered a way to cure smallpox by using the pus in a milkmaids hands after she ad caught cowpox. Jenners discovery was so popular and made such a difference that in 1840 the government baned any other treatment for smallpox other than Edwards.
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Richard Zsigmondy won the noble prize in chemistry in 1925 for developeing the ultramicroscope that could study objects below the wavelength of light.
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George Nomarski develops differential interference contrast microscopy.
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Gerd Binnig and Heinrich Rohrer invented the scanning tunneling microscope.this gives three-dimensional images of objects down to the atomic level. Both won the Nobel Prize in Physics in 1986. The powerful scanning tunneling microscope is the strongest
