Because of the difference in the language or the terminology used by psychologists from that used by ophthalmologists, it is somewhat difficult to express ideas which have the same ultimate meaning to both groups. This difference is primarily due to the diverging purposes of the two branches of science. While ophthalmologists are mostly interested in applying their knowledge to the practical art of healing eyes, the psychologist is determined to examine the behavior of the eyes, to establish data and to build theories, without making any effort to help or heal the eyes under examination. Consequently, when data have been found which are not consistent with past theory and are eventually challenging to methods of practice, it is with considerable reluctance that these findings are circulated in psychologic terms, before some additional or replacing elements have been found to supplant any changes indicated as necessary. And yet there
PECKHAM RH. FOVEAL PROJECTION DURING DUCTIONS. Arch Ophthalmol. 1934;12(4):562–566. doi:10.1001/archopht.1934.00830170100011
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