The toxic amblyopias: their classification, history, symptoms, pathology, and treatment . scotoma above. vision of both eyes failed at the same time, there wasyet some degree of asymmetry. Jonathan Hutchin-son, Jr.,2 records a case in, which one eye retained itsnormal vision until no less than six months had elapsedfrom the first failure of the other eye. He considers thisa unique observation, but in addition to the asymmetricalcases of Kampoldi, Galezowski and others, the observa-tions of Groenouw and Uhthoff are on record. I haveseen one unilateral tobacco-scotoma. (See Fig. 33.) 1 Annali di
The toxic amblyopias: their classification, history, symptoms, pathology, and treatment . scotoma above. vision of both eyes failed at the same time, there wasyet some degree of asymmetry. Jonathan Hutchin-son, Jr.,2 records a case in, which one eye retained itsnormal vision until no less than six months had elapsedfrom the first failure of the other eye. He considers thisa unique observation, but in addition to the asymmetricalcases of Kampoldi, Galezowski and others, the observa-tions of Groenouw and Uhthoff are on record. I haveseen one unilateral tobacco-scotoma. (See Fig. 33.) 1 Annali di Ottalmologia, Anno xiv., fasc. 23. 2 Trans, of the Ophth. Soc. of the United Kingdom, 1887, vii., p. 62, andRoyal London Ophthalmic Hospital Reports, 1886-87, xi., p. 188. AMBLYOPIA FROM THE AliUSE OF ToUACCO. 83 Hutchinson, Jr., lias noted a central scotoma for yel-low, with or without limitation of the color-field. Morerarely there is scotoma for blue; that is, red, green,yellow, and blue arc all confused or mistaken in thecentral part of the field. This condition has been Fig. Unilateral scotoma in tobacco-amblyopia. A man, aged fifty-eight, smokedsix cigars daily and drank whisky moderately (two drinks a day), V. 0. and no scotoma, but diminished green-sense over-fixing spot. V. O. and scotoma for red and green represented in diagram. observed by Simi,1 who has likewise seen , the color-scotoma may be absent for a , Vossius has described a case of high gradeintoxication-amblyopia without central scotoma, endingin complete Berry has found decided defects of the light-sense inabnormal states of the macular fibres of the optic nerve,and therefore, in those cases in which the central scotomahas not yet developed, he suggests this method of exami-nation as a diagnostic test of intoxication-amblyopia. 1 Boll, di Ocul., vol. xiii., 12. Abst. Archives of Ophthalmology, 1892,xxi., p. 408. 2 Klinische Monatsbl. f. Augenheilk,
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