A case of tobacco amblyopia presenting unusual defects in the visual fields : and a case of optic atrophy complicating beri-beri / by F. O'Kinealy.

  • O'Kinealy, F.
Date:
[1901]
Catalogue details

Licence: In copyright

Credit: A case of tobacco amblyopia presenting unusual defects in the visual fields : and a case of optic atrophy complicating beri-beri / by F. O'Kinealy. 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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    outwards beyond the blind spot to 20°, and lying chiefly in the lower and outer quadrant. Over these areas the above colours are seen as ((ark red and dark blue respectively, while between them in the upper and inner quadrant is a small strip of the field, about 5° wide, in which there is no defect. In the larger scotoma the defect for blue is the greater by 5° upward and 10° inwards, that for red extending 5'' further downwards ; while in the smaller scotoma the defect for red is slightly larger upwards, and that for blue extends somewhat further inwards. In the Left Field (Fig II) there is contraction for white outwards, and in all meridians for red and blue. Neither given nor yellow can be distinguished as such anywhere in the field, the former being called 'white or yellow, and the latter light red. There is a scotoma for red and blue extending from around the fixation point outwards beyond the blind spot to 30°, in which are i these colours are seen as dark red and dirk blue respectively, becoming darker towards the fixation point. The defect fur blue is the greater by 5° upwards The treatment consisted of absolute abstinence from all tobiceo and alcohol, combined with the administra- tion of Potassium Iodide, Mercury and Strychnine, the latter drag being given hypodtjrmically as well as by the mouth. He improved considerably, and at the time of hia dischiirge from hospital (April I7th, 1901), his visual condition was as follows : — V. R. =i imperfectly, Hm. + -5 D =f. Jaeger 16 easily, c + 2-75 D Sph = Jaeger I @ 30-5 cm. with diflaculty. V. L. = 1 imperfectly. Hm. +5 D = f with ditiiculty. Jaeger 16 easily, c + 3 D Sph = Jaeger 1 @ 30 o cm with difficulty. V. B. E. = f imperfectly, Hm. +-.5 D not improved. Jaeger 12, R + 2-7.5 D Sph ^ 1 ^ on ~ c—r ^ ^/ , =.Taeger 1 @ 30-o cm. fau-ly. L -(- 3 D Sph Boih Visual Fields (Figs III and IV) have improved. The limits foi wliite are still coiitracted outwards, but the boundaries for colours more nearly approach the normal, and the scotomata for red and blue h tve dis- appeared Yellow is still indistinguishable as such and is called ' light red througliout both fields, but