I have just stumbled across this article in PLOS Global Health on assessing the OFM for diagnostic use in the Philippines
Very much worth a read, with a lot of consideration for both local production and a comparison between the OFM and another microscope on pathology teaching slides.
This is a really nice discussion of the potential and remaining hurdles. The comparisons are particularly informative, as well as the assessment of the way the workflow would fit with existing practices.