Understanding and caring for an indirect ophthalmoscope | 合法醫療器材資訊網

由ICordero著作·2016·被引用3次—Thebinocularindirectophthalmoscope,orindirectophthalmoscope,isanopticalinstrumentwornontheexaminer'shead,andsometimesattachedto ...

The binocular indirect ophthalmoscope, or indirect ophthalmoscope, is an optical instrument worn on the examiners head, and sometimes attached to spectacles, that is used to inspect the fundus or back of the eye. It produces an stereoscopic image with between 2x and 5x magnification. It is valuable for diagnosis and treatment of retinal tears, holes, and detachments. The pupils must be fully dilated for it to work well.

In a dark room, the examiner orientates his/her head so that light from the internal light source is directed into the patients eye. A positive-powered condensing lens is held by the examiner at its focal length from the patients eye, serving two purposes ():

The lens ‘condenses’ light from the illumination system towards the patients pupil.

Light reflected from the retina passes back through the ...