. Medical diagnosis for the student and practitioner. Pig, r. Albuminuric Retinitis of Pregnancy Fig. 2. Retinitis Diabetica. Fig. 3. Retinitis Pigmentosa Fig. 4. Detachment of the Retina iFROM THORINGTONS OPHfHALMOSCOPE AND HOW TO USE IT ) OPTIC NEURITIS—OPHTHALMOSCOPY 1225 light upon the blind portion of the retina. If pupillary contraction occurs, thelesion is posterior to the corpora quadrigemina.* It should be rememberedthat (a) tract lesions ordinarily produce hemianopsia, (b) nerve lesions total blind-ness and that (c) central vision is retained in unilateral tract lesions becausethe ma
. Medical diagnosis for the student and practitioner. Pig, r. Albuminuric Retinitis of Pregnancy Fig. 2. Retinitis Diabetica. Fig. 3. Retinitis Pigmentosa Fig. 4. Detachment of the Retina iFROM THORINGTONS OPHfHALMOSCOPE AND HOW TO USE IT ) OPTIC NEURITIS—OPHTHALMOSCOPY 1225 light upon the blind portion of the retina. If pupillary contraction occurs, thelesion is posterior to the corpora quadrigemina.* It should be rememberedthat (a) tract lesions ordinarily produce hemianopsia, (b) nerve lesions total blind-ness and that (c) central vision is retained in unilateral tract lesions becausethe macula of each eye receives fibers from both optic tracts. Diagnostic Significance.—Disturbances of vision due to tract lesions areusually associated with gummata, new growths and syphilitic and tuberculousmeningitis. Associated Lesions.—Incomplete hemianopsia with aphasia and mind orword blindness indicates a cortical lesion. Angular gyrus lesions are suggestedby impaired vision in one eye associated with a contracted visual field of theopposite eye. Athetosis suggests a pulvinar lesion; altitudinal hemianopsia,a l
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectdiagnos, bookyear1922
