The pupil in extra-ocular disease / by Herbert C. de Cornwell.

  • Cornwell, Herbert C. de.
Date:
[1904]
Catalogue details

Licence: In copyright

Credit: The pupil in extra-ocular disease / by Herbert C. de Cornwell. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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    [Reprint from American ^fedic^ne, New Series, Vol. Ill, No. 10, pages 464-470, October, 1908. J - THE PUPIL IN EXTRA-OCULAR DISEASE.i HERBERT C. DE V. CORNWELL, M. D., So intimate is the relationship which the pupil bears to the nervous system, so much more complete than is the case with any other structure, and so characteristically are many nervous diseases mirrored by its deviations from the normal, that it may well be considered the barometer of the ner- vous system. In order to thoroughly understand the significance of pathological alterations in the pupils in their relation to extra-ocular conditions, we must know the mechanism governing them in the normal state. Two antagonistic sets of nerves control the normal tonus of the iris; the sympa- thetic, acting under appropriate stimulation as a dilator and the oculomotor nerve as a sphincter, either by direct action in ac- comodation, or indirectly through stimu- lation of the centripetal fibres of the re- flex arc. 'Read before the Harvard Medical Society of New York, Feb. 22, 1908. BY New York City.