. Transactions . etina, floor sloped considerably upwards towards the opticforamen, which opened at the extreme upper angles. Thespheno-maxillary fissure was of large size. The canal forthe infra-orbital nerve and the lacrymal canals werenormal. llie optic nerves were hardened in formol and Midlersfluid; teased preparations, transverse and longitudinalsections were made. Prolonged staining with eosin andsubsequent decolorisation showed the absence of all axiscylinders. The outer sheath was slightly thickened, and 160 DISEASES OF THK KETIXA AND CHOEOID. in places there were small areas of monon
. Transactions . etina, floor sloped considerably upwards towards the opticforamen, which opened at the extreme upper angles. Thespheno-maxillary fissure was of large size. The canal forthe infra-orbital nerve and the lacrymal canals werenormal. llie optic nerves were hardened in formol and Midlersfluid; teased preparations, transverse and longitudinalsections were made. Prolonged staining with eosin andsubsequent decolorisation showed the absence of all axiscylinders. The outer sheath was slightly thickened, and 160 DISEASES OF THK KETIXA AND CHOEOID. in places there were small areas of mononuclear leuco-cytosis. The nerve itself was made up of fibrous with the outer sheath, enclosing spaces devoidof all axis cylinders in the centre of the nerve sheath,there was a very large central artery and vein whichcould be traced in the nerve nearly to the optic walls of these vessels showed no pathological the entrance of the nerve into the globe there was a Fig. High-power view of the retina showing- ganglion cell layerabove. The rods and cones are lost in the preparation ofthe specimen, but traces of them can be recognised. very deep, sharply-defined cup slightly overhung by thesurrounding retina, no doubt due partly to the absence ofnerve-fibres and partly to the weak lamina cribrosa yield-ing to the normal interocular tension. Traces of tlu^hyaloid artery could be seen in some sections. Tlui choroid was hyper-developed, and consisted of largevascular channels. The rctiiKi.—Hie i)igment layer was noniial^ but therewas some albuminous effusion between this hiycr and thelayer of rods and cones. Tlic hiycr of rods and cones was TifKOMHOSIS OK TIIK CKXTKAL VEIN. M)I present, ])iit was eonsiderjibly broken up—partly, no doiihl,during the preparation of t]ie specimen, and partly ;is theresult of the exudation. ^J^iie nuclear and granular layerwere normal as far as could be ascertained. ^Jhe ganglioncell layer was present, the
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Keywords: ., bookcentury1800, bookdecade1880, bookpu, booksubjectophthalmology
