Extra-papillary colobomata / by G. Lindsay Johnson.

  • Johnson, G. Lindsay (George Lindsay), 1853-1943.
Date:
[1890]
Catalogue details

Licence: Public Domain Mark

Credit: Extra-papillary colobomata / by G. Lindsay Johnson. Source: Wellcome Collection.

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

    22/50 (page 20)
    coJobomata. Below these the fundus is stippled with pigment, but elsewhere the fundus is healthy. The Y S is lost in the coloboma. The drawing was only obtained after a most weari- some number of sittings, but the result is perfectly accurate (Fig, 4, Plate II.). V. F.: the child being so young it was found impossible to take this satisfactorily. Case 4 (Fig. 5, Plate III.).—Cathleen W , aged sixteen, of London. I am indebted to Prof. Tweedy and to Dr. T. Phillips, F.R.C.S., Eng., for allowing me to make use of this case. Family healthy ; six brothers and sisters, all healthy and good sight. Patient always had good health ; eyes normal in appearance, pupils active. Patient came to Moorfields complaining of her eyes aching when reading. L E, V = with + 2.25 D = -f and J i at 16 inches ; oph- thalmoscope : fundus and disc perfectly normal. R E, V = fingers only ; eye defective ever since she could remember. Refraction shows -f- 2 D ; ophthalmoscope : disc normal, pink ; vessels normal. Over region of Y S is a round-oval choroidal gap, the same size as the disc, bordered by a thin zone of pigment. The lower two thirds is nearly dense white, apparently of thickened sclerotic tissue. Two small branches of A. T. inf. pass into it and disappear, and a branch of A. T. sup. crosses it. The upper third is stippled with fine pigment. This coloboma connects the ends of a remarkable C-shaped, glistening, white patch. The upper limb appears to be entirely divested of choroid, and its inner part is limited by the sharp edge of the retino-choroid of the fundus. As we pass round the curve of the C-shaped patch this white deposit lies nearly on the surface and becomes irregularly scattered in a flocculent manner, and no free edge of either retina or choroid is visible anywhere. At the head end of the C patch are two naevoid-like patches of choroidal (?) vessels covered over with pig- ment. This pigment is quite superficial and almost obscures the head end of the C patch, becoming less and less in quantity towards the tail end, the last third of which is quite destitute of it. This pigment differs from the usual pigment I have observed in these colobomata, resembling that seen in retinitis pigmentosa. The choroid of the fundus enclosed by the C is thinned away in places, showing nearly bare sclerotic. The greater part of the C-shaped patch gives the impression of a deposit resembling that seen around the Y. S. in albuminuric retinitis. Between the coloboma and the disc, the field is traversed by innumerable radiating semi-opaque nerve fibres, while scattered here and there