The student's guide to diseases of the eye . FiG. 84.—Irregular contraction of fields of vision in a case ofprogressive atrophy of optic nerves. The loss is symme-trical, but more advanced in the L., where it has extendedover the fixation point; in the R. it has just reachedthe fixation point at one place. The black represents theparts FlG. 85.—Irregular contraction, with central loss, of L. visualfield, from progressive atrophy of optic nerve in locomotorataxy. The black represents the blind parts ; the shading-shows partial loss of vision. changes, with thickening of the connective-ti
The student's guide to diseases of the eye . FiG. 84.—Irregular contraction of fields of vision in a case ofprogressive atrophy of optic nerves. The loss is symme-trical, but more advanced in the L., where it has extendedover the fixation point; in the R. it has just reachedthe fixation point at one place. The black represents theparts FlG. 85.—Irregular contraction, with central loss, of L. visualfield, from progressive atrophy of optic nerve in locomotorataxy. The black represents the blind parts ; the shading-shows partial loss of vision. changes, with thickening of the connective-tissueframework and atrophy of the nerve-fibres, without DISEASES OF THE OPTIC NERVE 213 the occurrence of papillitis. The change in thesecases appears to begin at the disc, but the exact orderof events is not fully known in this large and im-portant group.—Groups 3 and 4 furnish the caseswhich are known clinically as primary or pro-gressive atrophy of the optic disc. Clinical aspects of Atrophy of the Discs.—As in opticneuritis, so in atrophy and pallor of the disc, there isno invariable relation between the appearance (espe-cially the colour) of the disc and the patients considerable degree of pallor, which it may be im-possible to distinguish from true atrophy, is some-times seen with excellent central vision (p. 32),th
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Keywords: ., bookcentury1800, booksu, booksubjecteye, booksubjectophthalmology
