New techniques in fundus examination: II. A new simplified technique for binocular indirect ophthalmoscopy.
A new technique of binocular indirect ophthalmoscopy uses a Finhoff transilluminator, held between the observer's eyes, as the light source. The light is focused in the patient's dilated pupil through a condensing lens in a darkened room and the image is seen stereoscopically. The advantages and limitations of this technique and the optical principles are highlighted.
D005654:Fundus Oculi; D006801:Humans; D007909:Lenses; D019721:Ophthalmoscopes; D009887:Ophthalmoscopy / Q000379:methods*; D011680:Pupil; D014172:Transillumination / Q000295:instrumentation