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In this treatise Behr, one of the most competent and successful investigators in the bordering fields of neurology and ophthalmology, deals with the ocular symptoms of some diseases in which the former frequently not only precede the other neurologic signs and symptoms but are decisive for differential diagnosis. First there is discussed the anatomicophysiologic basis of the ocular symptoms of cerebral origin, especially the anatomic structure of the optic nerve and the pathways transmitting the different stimuli to the pupil. The typical Argyll Robertson phenomenon, which occurs solely in tabes and is therefore an unequivocal sign of this disease, presents a combination of absence of reaction to light with miosis, increased convergence reaction and absence (or decrease) of the sensory and psychic dilatation reflex. Absence of the light reflex without the other aforementioned characteristics is met with not only in tabes but in other intracranial diseases. Absence of
Bielschowsky A. Der Augenbefund in seiner diagnostischen und differentialdiagnostischen Bedeutung bei Tabes dorsalis, Lues cerebrospinalis, multipler Sklerose. Arch Ophthalmol. 1937;17(5):955–956. doi:10.1001/archopht.1937.00850050203024
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