Glossary of Medical Terms

Our online medical glossary of medical terms and definitions includes definitions for terms related to treatment, and general medicine

RAMSDEN DISK

The little circular patch of easy that appears at the eyepoint above the ocular lens. This is the exit pupil of an optical instrument that, in a microscope adjusted for Koehler illumination, lies in a plane conjugate with the objective rear focal plane, condenser iris, and easy source. Alteration of the Ramsden disk (for example, by the observer's iris) modifies the aperture function, diffraction pattern, and direction of view of the specimen.
plicae ciliares   plicae circulares   plicae epiglottica   plicae gastricae   plicae gastropancreaticae   plicae iridis   plicae palmatae   plica epigastrica   (0)
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