red-free filter
red-free filter
Gynecology A green or blue filter used in colposcopy, which ↑ contrast between blood vessels and background, improving evaluation of superficial vessels. See Colposcopy. McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
References in periodicals archive
This machine has an ultra-widefield lens, alongside a
red-free filter, which means that more of the peripheral part of the fundus can be seen.
* The
red-free filter (green light) can be used to visually enhance lost nerve fibre bundles in glaucoma, or to give greater contrast to haemorrhages and the retinal vasculature
Choroidal naevus: Mildly elevated lesion with a feathery margin and consistent pigmentation, which disappears with a
red-free filter
Copyright © 2003-2025 Farlex, Inc
Disclaimer
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.