The fundus oculi with an ophthalmascopic atlas, illustrating its physiological and pathological conditions / By W. Adams Frost.

  • Frost, W. Adams (William Adams), 1853-1935.
Date:
1896
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Licence: Public Domain Mark

Credit: The fundus oculi with an ophthalmascopic atlas, illustrating its physiological and pathological conditions / By W. Adams Frost. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

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    presented no other symptoms of tubercular affection, and the subsequent history is unknown. Carpenter, in a paper on this subject,1 2 has given illustra- tions of the ophthalmoscopic appearances of several cases in which the history pointed to the choroiditis being of tubercular origin. How far contusions of the eye are capable, apart from haemorrhage, of starting progressive changes in the choroid, is at present doubtful. It is seldom that conclusive evidence can be obtained that the fundus was normal before the accident, and it must also be remembered that pigmentary disturbances of a degenerative character may occur in any blind eye. For these reasons, cases of choroiditis attributed to injury must be accepted with caution. This subject will be referred to again in dealing with rupture of the choroid. An affection of the choroid, more superficial than those yet described, produces an ophthalmoscopic appearance of rather closely aggregated pale-yellowish dots, with soft outline. These are most numerous in the macular region, to which they may be entirely confined. Attention was first directed to this condition by Hutchinson and Waren Tay/ It is commonly called “ Tay's Choroiditis/' The cases first described occurred in persons who were past middle life, and the condition was thought to be of a degenerative character. Similar ophthalmoscopic appearances have, however, been met with in patients of all ages. The affection commences in the superficial layers of the choroid, probably in the lamina vitrea; it tends to spread forwards into the pigment layer of the retina, and not backwards into the true structure of the choroid. For this reason, and also because the ophthalmoscopic appearance is similar to that produced by other 1 “Tuberculosis of the Choroid,” 1890. 2 Ophth. Hosp. Rep., London, vol. viii., p. 231, 1875.