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November 1961

Reaction Time in Normal and Amblyopic Eyes

Author Affiliations

Iowa City
From the Eye Clinic (Director: Prof. Dr. H. Harms) of the University of Tübingen, Germany.; Work done during leave of absence from the Department of Ophthalmology, College of Medicine, State University of Iowa.

Arch Ophthalmol. 1961;66(5):695-701. doi:10.1001/archopht.1961.00960010697015

In a recent communication we have demonstrated that sensation time, as determined by perceptual blanking is significantly prolonged in amblyopic eyes, if compared with results obtained from the sound fellow eye, or normal subjects.1 In this study the results of measurements of reaction time in normal and amblyopic patients under various testing conditions are reported. Reaction time is defined as the time elapsing between presentation of a sensory stimulus and an associated volitional motor response (Exner).2

Mackensen3 measured reaction time in a group of amblyopes. He found reaction time to be significantly prolonged in the amblyopic eyes. It was the purpose of this study to repeat Mackensen's experiments, and in addition, to modify the testing conditions in such a manner that during the testing procedure the functional demands for both eyes could be increased. Thus, reaction time was determined while one eye remained occluded, and under binocular

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