One of the important steps in the study of aniseikonia has been the determination of the repeatability of the measurements of the difference in the sizes of the ocular images of patients by different clinicians by means of independent examinations on different ophthalmoeikonometers, not only at a given time but after the lapse of a period of time. In view of the fact that refractive data are also obtained with these measurements, the repeatability of the refractive settings would also be obtained. In so far as is known, similar studies of the repeatability of other ophthalmic measurements, e. g., refraction, have never been made. Opportunities for studies of this kind may be rare, because of the peculiar organization necessary and the cost involved, and the research clinic is fortunate in being able to carry through such a program, even though it is somewhat inconvenient and troublesome for the patients. This
OGLE KN, IMUS HA, MADIGAN LF, BANNON RE, WILSON EC. REPEATABILITY OF OPHTHALMOEIKONOMETER MEASUREMENTS. Arch Ophthalmol. 1940;24(6):1179–1189. doi:10.1001/archopht.1940.00870060121008
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