Today’s invention is a microscope without any of those confusing and time-consuming focus knobs.
Instead, a fingerprint swipe device identifies the user (take the rubber gloves off first) and then sets the focus of the system accurately for the current level of magnification -based on one’s personal spectacle prescription (if any).
It might also alter the colour and intensity of illumination, based on pre-stated preferences -particularly useful for shared microscopes in busy labs.
Just for the record, this posting brings the average back to exactly one per day since I started -1035 days ago!