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 ?
Direct fundoscopy, fundus photography, slit-lamp and indirect ophthalmoscopy all play a role as individual modalities, and in combination, in the examination for diabetic eye disease.
When performed, the sensitivity of fundoscopy by primary care staff is quite low and even in the best of circumstances may be lower than the recommended standards for screening (sensitivity >80%, specificity >95% and technical failure <5%).
Preoperative evaluation included visual acuity, refraction, detailed Slit lamp Examination, applantion tonometry, dilated fundoscopy and keratometry.
This article discusses those abnormalities that result in hypopigmented lesions evident upon fundoscopy.
Examination included best corrected visual acuity and undilated fundoscopy using a direct ophthalmoscope.
Participants underwent standardized examinations including anthropometric indices, measurement of blood pressure, rebound tonometry and ocular examination including fundoscopy.
Binocular indirect fundoscopy (looking for the presence of papilloedema)
Read and Cook (5) reviewed the histories, carried out corrected visual acuity tests and performed undilated ophthalmic fundoscopy on 248 diabetic patients attending a day hospital in Cape Town, and found that only 5.
Looking at the allied health professionals, we saw our hospital optometrists were already involved in a glaucoma shared care scheme, they already had the fundoscopy skills and were already used to running their own consultations--taking notes, listening, running to time--and so we thought they were probably the closest we could get (to professionals being able to run the clinic that were not ophthalmologists) by boosting their OCT skills and teaching them how to read OCTs.
The following investigations were done: Hb%, Renal function tests, Liver function tests, Platelet count, Blood grouping and typing, Clotting time, Bleeding time, Fundoscopy, Urine for albumin and sugar and microscopy.
In some myopes, breaks in Bruch's membrane may be seen on fundoscopy as "lacquer cracks".