A treatise on diagnostic methods of examination . ent in simple chlorosis. Fig. 7. The Eyeground in Hereditary Syphilis.—Perivasculitis of the retinalvessels and choroiditis. Perivasculitis is especially characteristic for syphilis. ^ The vessels, especially the arteries, appear to be outlined in white, owing tothickening of their walls. In one place the changes are so pronounced that avessel is converted into a white strand, through which the blood-current can nolonger be observed. The picture presents the characteristic spots of choroidalatrophy, and pigment deposits in the choroid. The macu
A treatise on diagnostic methods of examination . ent in simple chlorosis. Fig. 7. The Eyeground in Hereditary Syphilis.—Perivasculitis of the retinalvessels and choroiditis. Perivasculitis is especially characteristic for syphilis. ^ The vessels, especially the arteries, appear to be outlined in white, owing tothickening of their walls. In one place the changes are so pronounced that avessel is converted into a white strand, through which the blood-current can nolonger be observed. The picture presents the characteristic spots of choroidalatrophy, and pigment deposits in the choroid. The macula lutea is especiallyplainly visible. Fig. 8. Choroidal Tubercle in Acute Miliary Tuberculosis.—The choroidaltubercles are characterized as ill-defined white spots which become more intenselywhite, usually of an absolutely round form, measuring one-quarter to one-half apapilla in diameter. In the later stages they are larger, and their site is independ-ent of the course of the blood-vessels. If they are situated in the region of a PLATE 1, Early stage of optio neuritis; 2, optic neuritis; 3, choked disli; 4, neuroretinitis hsemor-rhaglca in purpura ; 5, albuminuria neuroretinitis; 6, liemorrhagic retinitis in perniciousanemia ; 7, syphilitic chorioretinitis ; 8, miliary tubercle of the choroid ; 9, medullated nerye-libers. OPHTHALMOSCOPY. 705 blood-vessel they are covered by the latter. The drawing shows recent and oldtubercles. Especially characteristic in cases where the nature of these struotures IS not clear is their sudden appearance and increase within a few davs ltl^f^^f^^^^^^^^ ^^^J^^^^f.^VO^ by their usually circular form andthe Ill-defined margins of the choroidal tubercle. In the case depicted in thefigure, in addition to the mihary tubercles, there was a complicating tuberculousmeningitis, which explains the hyperemic and blurred appearance of the disk(beginning neuritis). Contrary to a well-spread belief, the presence of choroidaltubercles is a rarity in
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