An examination, under atropine, of the refractive state of eyes with normal vision (20/20), and which had never been affected with asthenopia or inflammation / by D.B. St. John Roosa.

  • Daniel Bennett St. John Roosa
Date:
[1878?]
Catalogue details

Licence: Public Domain Mark

Credit: An examination, under atropine, of the refractive state of eyes with normal vision (20/20), and which had never been affected with asthenopia or inflammation / by D.B. St. John Roosa. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    never suflfered for an instant from asthenopia, all the conditions for the injurious influences of strain of the a.ccommodation have existed in feeble organizations and weak muscular systems. Had I not had the facilities afforded by a large class of medical students, who are very ready for physiological experiments, I should never have succeeded in getting the cases that I now present. I must here present my grateful acknowledgments to the members of the Class of 1877-78 in the University of the City of New York, who so kindly submitted to the troublesome tests. It of course goes without saying, tlrat all the cases now about to be quoted conform to the conditions stated in the foregoing, i. e., the patients were not presbyopic ; they had also passed the age during which, in the opinion of some authorities, hypermetropia is always found ; they had V. |-g-, that sight was blurred by convex glasses of + -J^, and in some cases of still weaker power, they had never in all their lives suffered from asthenopia or ocular inflammation, and their accommodation was paralyzed by a four-grain solution of sulphate of atropia. Observation. I. —Dr. S., set. 30. V. R. E. = ; L. E., |®-. After a four-grain solution of the sulphate of atropia had been used four times in twenty- four hours, the vision of the right eye was reduced to 1-®-. It became with + O 90°. This gentleman used atropia for four days, and had some marked constitutional synqrtoms. The final ex- amination showed H. with H. as -1- axis 90°. II. —J. C. M., ast. 21. Began to go to school at seven, and has used his eyes as a student nearly ever since ; V. = . All posi- tive glasses blur. After the use of atropia, gr. four solution, three times in two days, vision with the right eye became §-[}- with -j- ; L.E., |“jj- without glasses, and |-J]- with in.—W. H., ret. 34. After atropia four times in twenty-four hours, L.E. having been atropinized, V. = |-g- + before atropia, f-®- with -P eV; two days after, -|-|>- — with -f- -gt/ 90° |-®-. IV.—H. J. H., set. 29. Has used his eyes as a student and teacher since he was six or seven years old ; is thin and pale, only moderately well developed; right eye examined after atropia in- stillation twice a day for two days. Accepts -f on the second day the day after + -gL- with which V. = -|-0-. Left eye of same patient was tested in the same way a month before ; vision was -I jj- under atropia without a glass, and |-JJ- with + The subject is anmmicand thin ; has bronchitis every winter ; one member of family died of phthisis..