How do doctors use microscopes to know if people are healthy?

While doctors do use microscopes as part of their diagnostic procedures, they don't solely rely on them to determine if someone is healthy. Microscopy is a tool that allows doctors to examine samples taken from the body, such as blood, urine, or tissue biopsies, at a microscopic level. It can help identify the presence of microorganisms like bacteria, viruses, or parasites, as well as abnormal cells or other structural changes that may be indicative of diseases or conditions.

Additionally, doctors often combine microscopic observations with other diagnostic methods like blood tests, imaging techniques, and patient history to make informed conclusions about a person's health. By integrating various sources of information, doctors can provide accurate diagnoses and appropriate treatments for their patients.