He wasn't looking for anything specific, and certainly was not trying to discover micro-organisms; he just thought that with enough magnfication it might be possible to see something that has not previously been seen, as indeed proved to be the case.
No, he verified the existence of cells.
Anton Van Leeuwenhoek is considered the father of microscopy because of the advances he made in microscope design and use.
handcrafted microscope
The microscope made by Antonie van Leeuwenhoek that could achieve a magnification of 300X is known as a single-lens, or simple, microscope. It consisted of a single high-quality lens that van Leeuwenhoek handcrafted to achieve those magnification levels, allowing him to make pioneering observations of microorganisms.
Anton van Leeuwenhoek discovered single-celled organisms, which he called "animalcules," in samples of water he had collected. He also was the first to observe and describe bacteria and sperm cells under a microscope.
It was Antonie van Leeuwenhoek who describes bacteria in 1673
Anton van Leeuwenhoek invented it around the 1850's to early 1860's.
The vacuole was discovered by Antony van Leeuwenhoek in the late 17th Century. He made the discovery using one of his inventions, the microscope.
He discovered both protists and bacteria
Leeuwenhoek contributed to the cell theory unicellular bacteria in 1674. Leeuwenhoek improved the microscope so that he was able to magnify with much better resolution than Hooke, which encouraged his discovery.
Van Leeuwenhoek did not discover the vacuole. The vacuole was first observed by scientist Rudolf Virchow in 1855. Van Leeuwenhoek is known for his discovery of bacteria and protists using a microscope.
No, he verified the existence of cells.
Anton Van Leeuwenhoek discovered plaque on peoples teeth
Anton van Leeuwenhoek verified Robert Hooke's discovery of cells by observing them through a microscope he had developed. Leeuwenhoek's meticulous observations of various biological samples provided further evidence to support Hooke's initial findings on the existence of cells.
The major scientists who made contributions to the discovery of cells are Robert Hooke, Theodor Schwann, Matthias Schleiden, Rudolf Virchow, and Antonie van Leeuwenhoek. Hooke coined the term "cell," Schwann and Schleiden proposed the cell theory, Virchow added the concept of cells arising from pre-existing cells, and Leeuwenhoek used microscopes to observe cells for the first time.
Serendipitou discoveries are discoveries made by accident, when looking for something else
Antonie Philips van Leeuwenhoek saw them first while using his primitive homemade microscopes.