The intimate relationship existing between the nasal mucosa and tear secretion is apparent to those who have given the matter thought, yet the literature on the subject is meager. My attention was first called to this relationship by the observation that following blocking of the sphenopalatine ganglion some patients complain of a sensation of dryness of the eyes and a relative absence of tears during weeping. It occurred to me to study the pathways of the tear reflex in an effort to find the cause of the mechanism and, if possible, to apply this same blocking of the sphenopalatine ganglion to cases in which one might desire to diminish the total volume of tears ; particularly in those cases in which an unsuccessful dacryocystectomy had been performed with stenosis of the nasolacrimal duct.
Mueller1 gave the tear reflex careful analysis. Although the ganglion cell groups that control tear secretion
RUSKIN SL. CONTROL OF TEARING BY BLOCKING THE NASAL GANGLION. Arch Ophthalmol. 1930;4(2):208–211. doi:https://doi.org/10.1001/archopht.1930.00810100054007
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