Microscope

A microscope is a Class I medical device (optical instrument) essential for visualizing microorganisms, cells, and tissues in clinical diagnostics, featuring magnifications from 40× to 1000× (oil immersion) with brightfield, phase contrast, fluorescence, darkfield, or polarized light capabilities. Standard clinical microscopes are binocular or trinocular with 4×, 10×, 40×, and 100× (oil) plan objectives, 10× widefield eyepieces, Abbe condenser, mechanical stage, and halogen or LED illumination. Fluorescence microscopes add specific filter cubes (FITC, TRITC, DAPI) and high-intensity light sources (mercury/xenon) for FISH, immunofluorescence, and AFB detection. Primary clinical applications include microbiological examination (Gram stains, AFB, wet mounts), hematology (differential counts, RBC morphology), histopathology (tissue sections, H&E, special stains), cytology (Pap smears, FNAs), urinalysis (sediment examination), parasitology (malaria, ova, parasites), and fertility (semen analysis). Essential equipment in every clinical laboratory for infectious disease diagnosis, cancer detection, hematological disorder evaluation, and countless other diagnostic applications requiring direct visualization of specimens.