However, there is some debate about this:
* Lack of definitive evidence: There is no surviving documentation of Janssen's microscope, and the information about its invention comes from secondary sources.
* Other contenders: Some historians suggest that Cornelis Drebbel, a Dutch inventor, might have developed a similar microscope independently around the same time.
Therefore, while Janssen is often credited with the invention of the compound microscope, it is important to remember that the exact origins and timeline remain somewhat uncertain.
