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The author worked under Ferree and Rand at Bryn Mawr College from 1922 to 1926. Since then she has held the Fellowship in Ophthalmology in the Medical School of the University of Pennsylvania and the position of Assistant in Perimetry to Dr. Holloway. She now reports her work on the threshold sensitivity of the retina, both achromatic and chromatic. Only one observer was used in these experiments, on which fact the author comments as follows : "While the use of more than one observer in these experiments was precluded by the range of work covered, the validity of result was secured not only through the standardization and control of all factors known to influence the sensitivity of the retina to color, but also through careful tests of the normality of the observer as to acuity, light and color sensitivity and visual fields and of the characteristics of peripheral refraction
Kronfeld PC. A Quantitative Study of Achromatic and Chromatic Sensitivity from Center to Periphery of the Visual Field. Arch Ophthalmol. 1932;7(2):346–347. doi:10.1001/archopht.1932.00820090186021
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