. The ophthalmoscope : its mode of application explained, and its value shown, in the exploration of internal diseases affecting the eye. Examined with ophthalmoscope.—A grey ring occupies * Can deficient pigment in any way be connected withthe fact, that such patients not only prefer, but often see betterin a dull light, or twilight? We know that in some animals,which seek their prey during night, the choroid is destitute ofpigment, or rather has white pigment in place of black; thisappears to increase the action of luminous rays upon theretina, and, together with the greater dilatation of th
. The ophthalmoscope : its mode of application explained, and its value shown, in the exploration of internal diseases affecting the eye. Examined with ophthalmoscope.—A grey ring occupies * Can deficient pigment in any way be connected withthe fact, that such patients not only prefer, but often see betterin a dull light, or twilight? We know that in some animals,which seek their prey during night, the choroid is destitute ofpigment, or rather has white pigment in place of black; thisappears to increase the action of luminous rays upon theretina, and, together with the greater dilatation of the pupil,increases their power of vision. THE OPHTHALMOSCOPE. 139 the central part of the optic nerve in the right eye, theperipheral margin of which is very irregular. Retinal vesselssmall, and appear to be pushed forward towards the vitreousbody {Fig. 7). The man is very pallid and nervous, andmuch dejected about his present impoverished condition; heis also badly clothed, and ill fed. Under a tonic plan of treatment, he began to improve;but country employment offering, he accepted it, and left thehospital. Fig. 7.—Right Partial insensibility of retina. In a large number of cases which present themselves tothe surgeon at a public hospital, it is not to be supposed thatany plan of treatment will be attended with more than anaverage amount of success: I subjoin an extract of twentycases reported upon by myself, and presented to the late , during the three months, October, November, andDecember, of 1855 :— No. 14 18 20 Male. Female. Male. Nature of disease as diagnosedwith the ophthalmoscope. Result. Male. Female. Female. Male. Male. Effusion retinal, optic nerve nearlyobscured by a dark red cloud. Congestion of choroid, with muscaein vitreous. Anaemic state of the retinoid ves-sels, loss of sight from nervousness. Effusion, striae in vitreous body,hyaloid membrane free, anaemia occa-sioned by large local blo
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Keywords: ., bookcentury1800, bookdecade1850, bookpublisherlondo, bookyear1858
