The microscope itself is usually harmless to the eyes, but prolonged use of the microscope may put the eye muscles under tension, which can easily cause eye fatigue, dry eyes, eye pain, and easy tearing. A microscope is an instrument that is used to observe tiny objects through the magnifying action of the eyepiece and objective lens. The microscope itself is not harmful to the user’s eyes, and the use of a microscope for a short period of time usually has no effect on the user’s eye health. For people who need to use microscopes for a long period of time, such as those engaged in scientific research, prolonged viewing of microscopes and work may prevent the eye muscles from relaxing for a long period of time, which may easily cause eyestrain and symptoms such as tearing and eye distension. Therefore, although the microscope itself has no effect on the user’s eyes, it is still recommended that long-time users relax their eyes after a certain period of time by doing outdoor activities, looking into the distance, etc., in order to minimize the occurrence of eye fatigue.