A team of physicists and engineers at the University of Strathclyde, in Scotland, working with a colleague from the University of Glasgow, has developed the means for 3D printing a microscope, including the lens, for under $60. In their paper posted on the bioRxiv preprint server, the group describes how they came up with the plans for the microscope and notes that the end result has a resolution strong enough to make out individual blood cells in test samples.
Mine does too but I don’t even think it could do something clear, nonetheless a lens of any type. I think we’ll see some amount of time pass before that sort of machine is readily available to the public in that context and time after that before enough people get handy enough with the maintenance for precision work like that.