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September 1951


Author Affiliations

Resident in Ophthalmology, Massachusetts Eye and Ear Infirmary (Dr. Brockhurst).; From the Laboratory of Applied Biophysics, Massachusetts Institute of Technology.

AMA Arch Ophthalmol. 1951;46(3):315-318. doi:10.1001/archopht.1951.01700020324007

IN THE preceding paper1 a method was described for electronically recording angular displacement, velocity, and acceleration of the eye. This method makes it possible to study not only the eye movements themselves but also the forces that come into play during these movements. The present investigation concerns itself with the study of these movements, and the forces causing them, during stress.

Investigations concerning eye movements under conditions of stress and ocular fatigue have been made frequently in the past.2 The result of much of this work is still unsatisfactory, especially in regard to fatigue. While some investigators find objective, as well as subjective, indications of fatigue, others have found no signs of impairment of characteristic ocular performances. It seemed interesting, therefore, to measure the work done by the extrinsic ocular muscles. The abovementioned dynamic method which measures the acceleration of the eye is particularly suitable for this purpose,

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