What was anton van leeuwenhoek's contribution to the cell theory?

He was the first to observe live cells in a sample of pond water with the use of a microscope.  

Explanation:

Anton van Leeuwenhoek is universally known as the Father of Microbiology.

He was the first person to discover a living cell under a microscope. He discovered protozoa (the single-celled organism) and named them animalcules.

hey bro i looked it up on google the structure of the eye-spot in euglena viridie, e. ehrenbergii, and phacus pyriyorme is not as franzé haa described it. the so-called “crystal body” and “lens bodies” were not found in any of the individuals of the species examined by me. as earlier observers have stated, the eye-spot consists simply of a mass of pigment granules arranged in a single layer, and probably embedded in a protoplasmic framework, but the latter could not be seen, and its presence was only inferred from the fact that the pigment granules must be held together in some way, thd the eye-spot as a whole is capable of expansion, and that the pigment granules can be separated from each other.

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