ophthalmoscope

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ophthalmoscope

(ŏfthăl`məskōp'), instrument used for examining the inner structure of the eyeeye,
organ of vision and light perception. In humans the eye is of the camera type, with an iris diaphragm and variable focusing, or accommodation. Other types of eye are the simple eye, found in many invertebrates, and the compound eye, found in insects and many other
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. The device was invented by the German physiologist H. L. F. von Helmholtz in 1851. His model consisted of three plates of glass pressed together and mounted on a handle at a 45° angle. A light was placed beside the subject whose eyes were to be examined. Some light passed through the plates, but some was reflected back into the eye. The form of the instrument now in general use consists of a concave mirror and a battery-powered light source within a tubular handle. Sighting is through a single or binocular eyepiece. The ophthalmoscope is equipped with a rotating disc of lenses to permit observation of the eye at varying depths and magnifications. Examination of the eye may be enhanced by administering drugs to dilate the pupil.

ophthalmoscope

[äf′thal·mə‚skōp]
(optics)
An instrument, consisting essentially of a concave mirror with a hole in it and fitted with lenses of different powers, for examining the interior of the eye through the pupil.

ophthalmoscope

an instrument for examining the interior of the eye
References in periodicals archive ?
All ri-scope L ophthalmoscope heads are dust-proof, with an easy to operate aperture hand-wheel for apertures and filters.
Table 22: World 15-Year Perspective for Ophthalmic DiagnosticDevices by Product Segment - Percentage Breakdown of VolumeSales for Ophthalmoscopes, Lens Meters, Slit Lamps,Tonometers, Perimeters, Corneal Topography Systems,Refractors, Diagnostic Imaging Systems, Fundus Cameras, andDiagnostic Ultrasound Equipment Markets for Years 2004, 2011& 2018 (includes corresponding Graph/Chart) II-98Ophthalmic Surgical Products II-99Table 23: World Recent Past, Current & Future Analysis forOphthalmic Surgical Devices by Geographic Region - US,Canada, Japan, Europe, Asia-Pacific, the Middle East, andLatin America Markets Independently Analyzed with AnnualSales Figures in Units for Years 2010 through 2018 (includescorresponding Graph/Chart) II-99
Market size data for Ophthalmic Diagnostic Equipments market categories - Fundus Cameras, Refractors, Retinal Ultrasound Imaging Systems, Ophthalmoscopes, Optical Coherence Tomography (OCT), Slit Lamps, Tonometers, Perimeters and Corneal Topography Systems.
Study Reliability and Reporting Limitations I-1 Disclaimers I-2 Data Interpretation & Reporting Level I-2 Quantitative Techniques & Analytics I-3 Product Definitions and Scope of Study I-3 Diagnostic Devices I-4 Perimeters I-4 Refractors I-4 Slit Lamps I-4 Tonometers I-4 Fundus Cameras I-4 Ophthalmoscopes I-4 Diagnostic Ultrasound Equipment I-4 Corneal Topography Systems I-4 Diagnostic Imaging Systems I-5 Surgical Products I-5 Ophthalmic Lasers I-5 Ophthalmic Surgical Microscopes I-5 Ophthalmic Disposables I-5
Table 33: Ophthalmoscopes, Mexico, Revenue ($m) by Sub-Segment, Forecast, 2009-2016 70
Medisave carries a full range of spares -- including everything from spare rim assemblies for a stethoscope to ear tips or bulbs for otoscopes and ophthalmoscopes.
FDA Approves Marketing of Optyse Lens Free Ophthalmoscope 70
26 /PRNewswire/ -- A unique product line of Scanning Laser Ophthalmoscopes (SLO's) developed by Odyssey Optical Systems will be shown to ophthalmologists during the American Academy of Ophthalmology annual convention in New Orleans (November 8 - 11).
Among the Zeiss products which Humphrey will market are slip lamps, fundus cameras, ophthalmoscopes and ophthalmic lasers.
Contract awarded for + Otoscope Ophthalmoscope / Oximeter D.