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)

    21/50 (page 19)
    V F very contracted for electric light, lo ° above, 20 ° be- low, 8° temp., 15 ° nasal. For white flag same-sized field, but different-shaped ; slight gap outer side ; no scotoma. See chart No. 2. Case 3 (Figs. 3 and 4, Plate II.).—George G , aged three and one half. Kindly sent by Dr. de Carey. Patient is a bright and intelligent child, born at full time. Mother perfectly healthy, both before and during confinement. Patient is the youngest of four children—all healthy and have good sight. No trace of syphilis in the family. Right eye, H i D ; V = |J probably [owing to his early age (three and one half years), it was very difficult to get him to answer questions, but several letters of the test line were pro- nounced]. Disc, fundus, and Y S all healthy. Hyperopic reflex and halo round Y S. Left eye, barely P. L.; globe undeveloped ; cornea about f diam- eter of right eye ; refraction with ophthalmoscope and retinoscopy about + I D ; lens well developed ; no sign of cataract; iris blue, acts well to light—entire (Figs. 3 and 4, Plate II.) ophthalmoscope disc lost in a white or faintly pink egg-shaped coloboma 3 P D's X 2 P D's, long axis vertical. The four superior vessels terminate ab- ruptly about the middle of the coloboma. The (numerous) lower ones curl over the lower edge of the coloboma, and, with one ex- ception, disappear. At the place where the vessels curl over is a round glistening mother-of-pearl-like depression, nearly the size of a normal disc, at a somewhat lower level than the rest of the coloboma. The upper part of the coloboma is on a level with the general fundus, the choroid and retina of which do not pass quite up to the edge of the coloboma, but are separated everywhere by a white marginal ring destitute of choroid. A little pigment (retinal) is heaped up here and there round the coloboma. At i\ P D's external to this coloboma is a boat-shaped choroidal gap or coloboma 2^ P D's X i P D, long axis horizon- tal. This is surrounded by a ring of black pigment and below by a second yellow ring of thinned choroid. The margin is strewn for some distance with fine pigment granules as well. Several choroidal vessels cover the gap from above inwards, and pass out of sight beneath the margin of the gap; the floor of the coloboma is a dirty white and is brought into focus with a — 2.5 D lens be- hind the mirror (direct) ; the choroid (and retina ?) are thinned, and in three places the sclera shines through between the two