On cases of congenital day-blindness with colour-blindness / by Edward Nettleship.

  • Nettleship, Edward, 1845-1913.
Date:
1880
Catalogue details

Licence: Public Domain Mark

Credit: On cases of congenital day-blindness with colour-blindness / by Edward Nettleship. 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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    has never been better than now, and formerly the nystagmus was much worse than it now is. June, 1878.—Y. each ; M. -J-g- = or -if; no material astigmatism. Reads smallest print at 10. Constant minute lateral nystagmus. Sees better in dull than in bright light, and always wears dark glasses in the daytime for this reason; even artificial light must be duller for him than for other people or he cannot see well. He is almost totally colour-blind, but says spontaneously that in very bright sunlight he can see red. Iu the spectrum he cannot distinguish any colours, only different shades. It is “lightest ” at the red end. Trial with Stilling’s, Snellen’s, and other tests showed that he could not distinguish with any certainty between any colours except by their luminosity; red he usually named correctly when bright or when held very close; yellow, blue, and green are indistinguishable except by differences of shade. Ophthalmoscope.—Media clear; M. about Discs rather pale; the right showing a white, semi-transparent, glistening band of fibrous tissue, extending beyond its margin in the form of a capital D, and beneath the large vessels; the left slight haze along the large vessels. At the Y. S. region of the left a single small round spot of choroidal disease (a “ punched out ” spot), and in right a few similar, but much smaller dots, seen by the erect image. These appearances seemed to point to the previous occurrence of a clioroido-retinitis, possibly just after birth. The only important facts in the history were as follows :—The mother told me that three or four days before the patient was born the “ waters broke and came away,” and that the confine- ment was rather quick. When born the child was scarcely alive, and was indeed laid aside for a short time as dead, only being revived by artificial respiration. For several days he hardly opened his eyes, and seemed not to see; and then, when open, there was for several weeks “ a sort of red skin” over the eyes, which, however, the medical man did not think important. The patient is the only one of Mrs. G—’s five children about whose birth and early infancy there was any peculiarity. Family III.—Cases 4, 5, 6, and 7 are four children of one family (P—), with eye symptoms very similar to those in