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The discovery of blood cells in the human body paved the way for advanced studies in cell biology. Early discovery of genes in volved in human development by Edward Lewis, Christine Nusslein and Eric Wieschaus in 1995 is a clear demonstration of the importance of microscopes in the life sciences.
The most common is the optical microscope, which uses light to image the sample. Other major types of microscopes are the electron microscope, the ultramicroscope, and the various types of scanning probe microscope. Circa 1000AD â The first vision aid was invented (inventor unknown) called a reading stone.