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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    are a number of yellowish-white dots quite superficial. The presence of these nerve fibres gives support to the supposition that the C-shaped patch is partly congenital, but what proportion is due to persistency of medullary substance or embryonic tissue and what to disease it was impossible to determine. The urine was tested and found free from albumen, and, more- over, the patient was in the best of health. Case 5 (Fig. 6, PI. III.).—Eleanor E., aged twenty-three. Pa- tient came to Moorfield's on account of defective sight in the right eye and was kindly handed over to me by Mr. Lawson. Has never noticed any thing wrong with the left eye. Cannot be sure that she has ever seen well with her right eye, but noticed its defect by accidentally covering her left eye a few weeks ago. V L = I and J i. Fundus perfectly healthy. V R = P. L. only. Ophthalmosc. : R E, disc normal. Vessels slightly tortuous, es- pecially the veins. Arising from near the centre of the disc is a short, thick, bladder-like vessel ending in a cul-de-sac, about J P D long, as it appears foreshortened by the ope. Its direction is forwards and downwards, and, illuminated by the mirror, casts a distinct shadow on the fundus. It is only attached to the disc, its anterior end being quite free and movable in the vitreous. At its attachment to the disc there is distinct pulsation, and the whole vessel moves with each beat of the artery. I think I can trace its junction with the main trunk of the inf. retinal A^. If it is a persistent hyaloid artery (and I cannot account for it otherwise), it will give force to the claim of my placing the peculiar patch about to be described among my collection of colobomata. One P D to the outer side of the disc is an oval-shaped depres- sion, occupying the greater part of which is a tongue-shaped, naevoid-like growth, looking like an oyster half removed from its shell. The patch, 2 P D's X ij- P D's, has its long axis vertical. The inner and outer margins overhanging the patch are white and glistening. The margins are not white from atrophic changes or deposit, as on careful focussing a great number of fine nerve-fibres are traced across them which can, moreover, be traced over the fundus for a little way. The floor of the patch around the black mass is slightly behind the edge of the patch about i D to ij D's only. It is white and glistening, the greater part covered over with fine gray pigment. Slight parallax between the outer edge and the white floor is noticed. Directed obliquely, downwards