ophthalmoscope

ophthalmoscope
A device for studying the interior of the eyeball through the pupil. SYN: funduscope. [ophthalmo- + G. skopeo, to examine]
- binocular o. an o. that provides a stereoscopic view of the fundus.
- demonstration o. an o. by which the fundus may be seen simultaneously by more than one observer.
- direct o. an instrument designed to visualize the interior of the eye, with the instrument relatively close to the subject's eye and the observer viewing an upright magnified image.
- indirect o. an instrument designed to visualize the interior of the eye, with the instrument at arm's length from the subject's eye and the observer viewing an inverted image through a convex lens located between the instrument and the subject's eye.

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oph·thal·mo·scope äf-'thal-mə-.skōp n 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
oph·thal·mo·scop·ic -.thal-mə-'skäp-ik adj
oph·thal·mo·scop·i·cal·ly -i-k(ə-)lē adv

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n.
an instrument for examining the interior of the eye. There are two types. The direct ophthalmoscope enables a fine beam of light to be directed into the eye and at the same time allows the examiner to see the spot where the beam falls inside the eye. Examiner and subject are very close together. In the indirect ophthalmoscope an image of the inside of the eye is formed between the subject and the examiner; it is this image that the examiner sees. The examiner and subject are almost an arm's length apart. A scanning laser ophthalmoscope uses a scanning camera, rather than a human observer, to view the inside of the eye.

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oph·thal·mo·scope (of-thalґmo-skōp) [ophthalmo- + -scope] an instrument containing a perforated mirror and lenses used to examine the interior of the eye; called also funduscope.

Medical dictionary. 2011.

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Look at other dictionaries:

  • Ophthalmoscope — Oph*thal mo*scope, n. [From Gr. ofqalmo s the eye + scope.] (Physiol.) An instrument for viewing the interior of the eye, particularly the retina. Light is thrown into the eye by a mirror (usually concave) and the interior is then examined with… …   The Collaborative International Dictionary of English

  • ophthalmoscope — (n.) 1857 in English; coined 1852 by German physician and physicist Hermann Ludwig Ferdinand von Helmholtz (1821–1894) from OPHTHALMO (Cf. ophthalmo ) + SCOPE (Cf. scope) …   Etymology dictionary

  • ophthalmoscope — [äf thal′mə skōp΄] n. [ OPHTHALMO + SCOPE] an instrument used to examine the interior of the eye: it consists of a perforated mirror arranged to reflect light from a small bulb into the eye ophthalmoscopic [äf thal′məskäp′ik] adj. ophthalmoscopy… …   English World dictionary

  • Ophthalmoscope — The ophthalmoscope (or funduscope) is an instrument used to examine the eye. Its use is crucial in determining the health of the retina and the vitreous humor. In patients with headaches, the finding of swollen optic discs, or papilledema, on… …   Wikipedia

  • ophthalmoscope — ophthalmoscopic /of thal meuh skop ik, op /, ophthalmoscopical, adj. /of thal meuh skohp , op /, n. an instrument for viewing the interior of the eye or examining the retina. [1855 60; OPHTHALMO + SCOPE] * * * ▪ instrument       instrument for… …   Universalium

  • ophthalmoscope — n. an instrument for examining the interior of the eye. There are two types. The direct ophthalmoscope enables a fine beam of light to be directed into the eye and at the same time allows the examiner to see the spot where the beam falls inside… …   The new mediacal dictionary

  • ophthalmoscope — noun Etymology: International Scientific Vocabulary Date: circa 1857 an instrument for use in viewing the interior of the eye and especially the retina • ophthalmoscopic adjective • ophthalmoscopy noun …   New Collegiate Dictionary

  • ophthalmoscope — noun an instrument for examining the interior of the eye …   Wiktionary

  • ophthalmoscope — (o ftal mo sko p ) s. m. Instrument qui sert à examiner l intérieur de l oeil. ÉTYMOLOGIE    Termes grecs signifiant oeil et examiner …   Dictionnaire de la Langue Française d'Émile Littré

  • ophthalmoscope — instrument for viewing the interior of the eye Scientific Instruments …   Phrontistery dictionary

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