There are several instances when it may be important to view hair under a microscope. Hair transplant applications require the use of a stereo microscope. The image below shows a hair follicle technician using a Meiji stereo microscope to examine hair follicles.
To determine overall health of a single strand of a hair, a biological microscope can be used. The images below were captured with the National Optical 131-CLED student microscope and a Nikon camera.