THE STUDY OF SUN GLARE IN IRAQ

Abstract

The author (squadron-leader, R.A.F.M.S.) presents the results of a study upon 129 cases. General classification: indoor and outdoor workers. Monthly observations for a period of 15 months (two summer, one winter season). Part I (introduction): analysis of solar spectrum and the influence of its component parts upon the eyes; influence of local conditions upon sun glare; the varying exposure of workers in different trades to sun glare; consideration of glare as it concerns those engaged in aviation. Part II (experimental investigation): discussion of tests employed and technique followed. Part III: graphs, tables, calculations; interpretations of results and the general conclusions: (1) ocular fatigue effects of glare can be fully demonstrated in varying degree; (2) pulse rate is greater in summer, but remains within normal limits; (3) a condition of mental inertia is demonstrable in many instances; (4) fatigue of accommodation and convergence is almost universal; (5) reduced light sense and threshold is exceedingly common; (6) changes in the visual fields take place in many instances and show considerable variations; (7) visible ophthalmoscopic changes do not occur through reflected desert sunlight; (8) eye color is unimportant as a method of deducing glare susceptibility; (9) the careful use of anti-glare spectacles offers a valuable and proved means of ocular protection; (10) pilots appear to suffer more from deterioration of light sense, drivers of motor transport tend to suffer more from fatigue of accommodation and convergence, and members of the clerical staff show tendency to ocular muscle weakness and weak binocular fusion. Part IV: symptoms and clinical signs of sun glare (photophobia dolorosa tropicalis); prophylaxis and treatment; illustrative cases. (PsycINFO Database Record (c) 2012 APA, all rights reserved)