Loss of sight from disuse of the eye (amblyopia ex anopsia) / by D.B. St. John Roosa.

  • Roosa, D. B. St. John (Daniel Bennett St. John), 1838-1908.
Date:
[1905]
Catalogue details

Licence: In copyright

Credit: Loss of sight from disuse of the eye (amblyopia ex anopsia) / 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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    pupil is irregular, and filled with broken-up lens matter. There is a small opening in the upper part ‘ of the lens. The right eye, which, in early youth, was afifected with convergent strabismus, and, as has been stated, after an operation, with divergent strabismus, was now somewhat turned downward, and had eccentric fixation. I operated upon the left eye for the purpose of removing the lens matter and breaking up the an- terior synechia. An iridectomy was performed upon the temporal side, and the lens matter removed. An excellent opening resulted. I pass from this portion of the case merely by saying that the corneal astigmatism was so much and so irregular that no better vision could be obtained than he had before the operation, ■?<&. I now turned my attention to the amblyopic eye, as being the hope of the patient, if the theory were correct, that it was amblyopic from disuse simply. I found no lesion of the fundus oculi, and it was pronounced to be normal by my associate, Dr. Emerson, and my colleague, Dr. A. E. Davis, who saw the case in consultation, and by myself. After thoroughly testing the patient, he was ordered the following glasses: R. + 3-50c 130° L. -f- 11 A -f- 4 was added to the cylindric, on the right, for reading. He could not then read ordinary type. The patient was advised to exercise his eyes in reading, beginning with children’s primers, and the hope was held out to him that his vision would ultimately be improved. One year and a half after- ward his distant vision was not in the least improved, but he read No 1 Jaeger with his glass. He was urged to persevere, and he appeared, on October 26,