Electron microscope
Electron microscope: A microscope in which an electron beam replaces light to form the image. An electron microscope permits greater magnification and resolution than an optical microscope, but the electron densities of objects are shown rather than their actual images. Abbreviated EM.
Read Also:
- Electron microscopy
Electron microscopy: Abbreviated EM. Microscopy in which an electron beam replaces light to form the image. EM has its pluses (greater magnification and resolution than optical microscopes) and minuses (you are not really “seeing” objects, but rather you are looking at their electron densities, and meaningless artifacts may abound). Nonetheless, EM has extended the range […]
- Electronystagmogram
Electronystagmogram: A recording of the eye movements, usually done to confirm the presence of nystagmus. Electronystagmogram may be done in cases of vertigo (dizziness) to determine if there is damage to the vestibular portion of the acoustic nerve. The test may be done in cases of possible acoustic neuroma, Meniere disease, positional vertigo, and labyrinthitis. […]
- Electrophoresis
Electrophoresis: A method used in clinical and research laboratories for separating molecules according to their size and electrical charge. An electric current is passed through a medium that contains the mixture of molecules. Each kind of molecule travels through the medium at a different rate, depending on its electrical charge and molecular size. Separation of […]
- Electrophoretic
Electrophoretic: Pertaining to electrophoresis, the separation of molecules according to their size and electrical charge by applying an electric current to them.
- Electrophysiologic retinal testing
Electrophysiologic retinal testing: Testing done to diagnose specific disorders of the retina, including inherited retinal diseases, the effects of toxic drug exposure on the retina, and the presence of foreign bodies within the eye. The most commonly performed electrophysiologic test is the electroretinogram (ERG). Other electrophysiologic tests include electro-oculography (EOG), visual evoked response (VER), dark […]