. A Reference handbook of the medical sciences : embracing the entire range of scientific and practical medicine and allied science. vitreous takes place at the papil-la, is the most probable one. Leplat concludes, from someexperiments very recently undertaken, that the nutritivefluids of the vitreous are secreted by the ciliary body, buthe emphasizes the statement that it is from the ciliarybody alone that these fluids come. From this point thecurrent travels backward, and that portion which entersthe central canal of the vitreous flows rapidly toward thepapilla. Certain clinical facts, howev
. A Reference handbook of the medical sciences : embracing the entire range of scientific and practical medicine and allied science. vitreous takes place at the papil-la, is the most probable one. Leplat concludes, from someexperiments very recently undertaken, that the nutritivefluids of the vitreous are secreted by the ciliary body, buthe emphasizes the statement that it is from the ciliarybody alone that these fluids come. From this point thecurrent travels backward, and that portion which entersthe central canal of the vitreous flows rapidly toward thepapilla. Certain clinical facts, however, seem to favorthe view that the vitreous is supplied with nutritive fluidby the whole uveal tract. In choroiditis, not involvingthe ciliary region, opacities are met with in the myopia the posterior layers of the vitreous are some-times liquefied. It is an admitted fact that the rods andcones derive their nourishment from the choroid, but itis difficult to imagine that nutrient fluid should traversethe retina, which has a very different blood-supply, inorder to reach the vitreous ; if so, it should contribute to. Fig. 4608.—Various Cell-forms met with in the Normal Vitreous, a and6 represent the fusiform or stellate cells described by Iwanoff, and arefound principally in the cortex. They are of the most irregular shapewith curved outline, and several protoplasmic prolongations with hereand there spheroidal swellings. They are usually isolated. The endof the processes is sometimes pointed, a, and sometimes contains aprotoplasmic globule, d. c. e,/, and g, represent a third form of cellsdescribed by Iwanoff, which contain a clear vesicle in the cellular of these cells are provided with processes, and give the impressionof swelling of the cellular substance by imbibition. In some of thesecells there are two vesicles connected by a bridge of protoplasm whichcontains the nucleus, g. (Taken from the article by Schwalbe on theAnatomy of the Vitreous in the T
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectmedicine, bookyear188
