title: Modification of Welch-Allyn "11500 ophthalmoscope for visuoscopy.
abstract: Visuoscopy is an indispensable test in the evaluation of the monocular fixation pattern. Unfortunately, the instrumentation needed to accurately perform the test is often costly. A procedure describing how the Welch-Allyn "11500 ophthalmoscope may be inexpensively modified for the routine performance of visuoscopy is presented.
mesh_terms: D005403:Fixation, Ocular; D006801:Humans; D019721:Ophthalmoscopes; D012160:Retina