A manual and atlas of medical ophthalmoscopy / by W.R. Gowers.

  • Gowers, W. R. (William Richard), 1845-1915.
Date:
1890
Catalogue details

Licence: Public Domain Mark

Credit: A manual and atlas of medical ophthalmoscopy / by W.R. Gowers. Source: Wellcome Collection.

    141/392 (page 125)
    126 Sector-like defects in the field are met with in secondary atrophy, especially in cases of injury to the trunk of the nerve at the posterior part of the orbit. They also occa- sionally occur in simple progressive atrophy and in spinal atrophy. A well-marked instance of this condition in spinal atrophy is shown in Figs. 57 and 58. The patient was in the earhest stage of locomotor ataxy. The optic discs were grey and the vessels small; vision was R. yVj w Sector-like defects in primary atrophy may be, as in this case, symmetrical, but they are sometimes unilateral, as in a tabetic atrophy recorded by Uhthoff,^ where in one eye there was a defect of the upper and inner quadrant, and in two cases described by Treitel there was a defect in the inner and lower part in the right eye, as in the case figured. Central scotomata are usually transversely oval, extending from the bHnd point to the fixing point, sometimes involving both, sometimes one only. It is uncertain at which point they usually commence. The periphery of the field is usually normal, but it may probably sometimes be restricted. There is always a loss of colour-vision, and this may be greater and occur earher than that for white. Red and green are first, and may be only lost. Central scotomata for red are Fig. 57. Fig. 58. Sector-like Defect in Fields of Vision in a Case of Spinal Atrophy. The shading represents amblyopia, tire black loss. The dotted line shows the boundary of the field for red. Where it is absent the field ceased so gradually that its limit could not be ascertained. ^ Arch. f. Ophth., vol. xxvi. 1880, pt. 1, p. 277.