Optical apparatus and instruments, namely, apparatus for use in optically evaluating diagnostic samples for laboratory or research use; scientific, research, navigation, surveying, photographic, cinematographic, audiovisual, optical, weighing, measuring, signaling, detecting, testing, inspecting, life-saving and teaching apparatus and instruments, namely, computers, cameras, microscopes, and laboratory equipment in the nature of microscope slides, microarrays, funnels, test tubes, and incubat...