ophthalmoscope

noun
oph·​thal·​mo·​scope | \ äf-ˈthal-mə-ˌskōp How to pronounce ophthalmoscope (audio) , äp- \

Definition of ophthalmoscope

: an instrument for use in viewing the interior of the eye and especially the retina

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Other Words from ophthalmoscope

ophthalmoscopic \ (ˌ)äf-​ˌthal-​mə-​ˈskä-​pik How to pronounce ophthalmoscopic (audio) , (ˌ)äp-​ \ adjective
ophthalmoscopy \ ˌäf-​thəl-​ˈmä-​skə-​pē How to pronounce ophthalmoscopy (audio) , ˌäp-​ , -​ˌthal-​ \ noun

Examples of ophthalmoscope in a Sentence

Recent Examples on the Web Normally, a glaucoma screening requires a doctor’s visit and the use of an ophthalmoscope to view the fundus, the internal lining of the eye and measure the health of a patient’s retina. Nathan Percy, Orange County Register, "Tesoro senior’s vision for glaucoma app wins national recognition," 10 Feb. 2017 An ophthalmoscope image of diabetic retinopathy shows damage to the retina caused by diabetes. Eric Schmidt, Newsweek, "Alphabet's Eric Schmidt: We Should Embrace Machine Learning—Not Fear It," 10 Jan. 2017 So researchers at the University of Warwick in Coventry in the U.K. spent three years developing an ophthalmoscope that creates a high-quality digital image using fancy technology. Kristen Philipkoski, WIRED, "All the Cool Ophthalmologists are Using It," 5 Mar. 2007 New equipment like x-ray machines, ophthalmoscopes, and cardiographs improved diagnostic and therapeutic options. Jeanne Kisacky, Smithsonian, "When Fresh Air Went Out of Fashion at Hospitals," 14 June 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ophthalmoscope.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of ophthalmoscope

circa 1857, in the meaning defined above

History and Etymology for ophthalmoscope

borrowed from French, from ophthalmo- ophthalmo- + -scope -scope, after ophthalmoscopie "examination of the eye"

Note: Word probably introduced by the physician A.-C. Maressal de Marsilly in "Notice sur l'ophthalmoscope de MM. Follin et Nachet," Annales d'oculistique, tome 28 (2e semestre 1852), pp. 76-86. Marsilly applied the word to a device developed by Eugène Follin and manufactured by Jean-Alfred Nachet, a modification of the original ophthalmoscope developed by Hermann von helmholtz. Helmholtz first described his invention in a monograph, Beschreibung eines Augen-Spiegels zur Untersuchung der Netzhaut im lebenden Auge (Berlin, 1851), using for the device a word Augenspiegel ("eye-mirror") that had been used earlier in German for eyeglasses. See James G. Ravin, "Sesquicentennial of the Ophthalmoscope," Archives of Ophthalmology, vol. 117, no. 12 (December 1, 1999), pp. 1634-68.

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Time Traveler for ophthalmoscope

Time Traveler

The first known use of ophthalmoscope was circa 1857

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Cite this Entry

“Ophthalmoscope.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ophthalmoscope. Accessed 5 Dec. 2020.

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More Definitions for ophthalmoscope

ophthalmoscope

noun
oph·​thal·​mo·​scope | \ äf-ˈthal-mə-ˌskōp How to pronounce ophthalmoscope (audio) \

Medical Definition of ophthalmoscope

: an instrument for viewing the interior of the eye consisting of a concave mirror with a hole in the center through which the observer examines the eye, a source of light that is reflected into the eye by the mirror, and lenses in the mirror which can be rotated into the opening in the mirror to neutralize the refracting power of the eye being examined and thus make the image of the fundus clear

Other Words from ophthalmoscope

ophthalmoscopic \ -​ˌthal-​mə-​ˈskäp-​ik How to pronounce ophthalmoscopic (audio) \ adjective
ophthalmoscopically \ -​i-​k(ə-​)lē How to pronounce ophthalmoscopically (audio) \ adverb

More from Merriam-Webster on ophthalmoscope

Britannica.com: Encyclopedia article about ophthalmoscope

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