. The science and art of surgery, embracing minor and operative surgery. Comp. from standard allopathic authorities, and adapted to homoeopathic therapeutics, with a general history of surgery from the earliest periods to the present time .. . he disk be hyperaemic, it will naturally partake of the extravascularity, but not always; for the disk may be injected withsmall vessels, while the retinal vessels are natural. Its vesselsare subject to varicosities ; and a certain indistinctness of outlineis frequently observable in its overloaded veins. The arteriesoften show plastic exudations in thei
. The science and art of surgery, embracing minor and operative surgery. Comp. from standard allopathic authorities, and adapted to homoeopathic therapeutics, with a general history of surgery from the earliest periods to the present time .. . he disk be hyperaemic, it will naturally partake of the extravascularity, but not always; for the disk may be injected withsmall vessels, while the retinal vessels are natural. Its vesselsare subject to varicosities ; and a certain indistinctness of outlineis frequently observable in its overloaded veins. The arteriesoften show plastic exudations in their course, which have evidentlybeen deposits during an inflammatory state, Fig. 356. Extrav-asations of blood are occasionally seen from the rupture of oneor more of the vessels, Fig. 357 ; the gradual absorption ofwhich may be watched. Serous effusions between the retina andchoroid are attended always with more or less danger to sight,according to the locality and amount of the effused fluid. Theretina may be seen, floating as it were, or lying in folds over thepart, the bright red choroid of course being hidden from the effusion is over or near the macula lutea, so is a more 540 SCIENCE AND ART OF SURGERY. Fig. 356. Fig. Inflammatory deposits on the retina. Extravasations of blood on the retina* unfavorable prognosis to be feared. The retina is often anaemieand even atrophied. M. Desmarres describes an affection whichhe calls oedema of the retina. It is doubtless affected in second-ary syphilis. The Choroid, as may be anticipated from the vascularity ofits structure, is most importantly involved in chronic changes inthe deep-seated structures of the eye ; and although we are by nomeans disposed to draw any strict line between the inflammationof the different tunics of the eye, as existing independently ofeach other; yet this structure shows changes so marked that theeffects of choroiditis may be safely classed under one head. Theprincipal affections of the choro
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