How were microscopes used back then?

Historically, microscopes were used primarily for scientific exploration and discovery in fields like Biology and medicine. Early microscopes, such as those developed in the 17th century by Antonie van Leeuwenhoek, allowed scientists to observe microorganisms and cellular structures for the first time. This led to significant advancements in understanding health, disease, and the complexity of life, paving the way for modern microbiology and cell theory. Additionally, microscopes facilitated the study of materials in fields like geology and material science.