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)

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    and outwards, is a naevoid-like reddish mass, covered with dense black pigment. In the centre of this patch two spots of white (sclerotic ?) shine through where the pigment mesh is open. A few fine arterial twigs cross the coloboma, but they do not curl over the edge, but pass uninterruptedly across. Below the patch and separated i P D from it is a crescentic flocculent deposit, quite superficial. Two P D's below this again, abutting the inferior temporal artery, is a single black spot, ^ or J P D in breadth. This spot is quite different from the craters so commonly seen in specific choroiditis disseminata, having its pig- ment almost entirely confined to the centre. (The drawing is here incorrect.) Lastly, this is the only spot to be seen in either fundus, while no history or sign of syphilis can be traced in the family. A small hemorrhage is to be seen i P D below and internal to the coloboma. (Since writing this I have again examined the eye, and find now, Oct. 14, '89, that the superficial white deposit has almost entirely disappeared, while the artery which runs along the upper border of the black spot is obscured for about 2 P D's and then becomes well defined. Lastly, five small recent retinal hemor- rhages can be traced to a minute artery at the extreme outer edge of the nsevoid-like growth.) It may be possible that the changes seen in this case and the C-shaped crescent in the one previously described (Figs. 5 and 6, PI. III.) are secondary to the true physiological colobomata, which, being spots of least resist- ance, have attracted, as it were, the pathological changes to their neighborhood. Case 6 (Fig. 7, Plate IV.).—Sarah S , aged twenty-two. Patient came to me at the Western General Dispensary owing to her eyes becoming inflamed after much reading. Has never been ill in her life. Mother in good health during each con- finement. V R = f, with -f 2 D = -f. V L =r I, with + 2 D = |. Ophthalmoscope: R E, disc and vessels normal. Fundus everywhere (excluding coloboma) normal. Y. S. dark red, ^ P D ; 3J P D external to disc, and with upper border on a level with macula, is an egg-shaped coloboma 2 P D's X i J P D's, long axis horizontal. The coloboma is bounded by a ring of dense black pigment, less in the upper part than the lower, where it spreads for some distance beyond the coloboma over the field in the form