While I am not an advocate of electrically illuminated test objects in preference to the ordinary methods now used in mapping out the visual field and the blind spot, I believe such devices have their field of usefulness and can often be employed to advantage, for example, in office or dispensary work on dark days or in the evenings, and bedside examinations in poorly illuminated rooms or wards. To meet such Downloaded From: http://jama.jamanetwork.com/ by a RYERSON UNIVERSITY LIBRARY User on 06/17/2015
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