A treatise on the principal diseases of the eyes / by Antonio Scarpa ; translated from the Italian, with notes, by James Briggs.

  • Scarpa, Antonio, 1752-1832.
Date:
1806
Catalogue details

Licence: In copyright

Credit: A treatise on the principal diseases of the eyes / by Antonio Scarpa ; translated from the Italian, with notes, by James Briggs. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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    tenfion which they have fufTered difpofes them, as well as the integuments, to ulcerate from the Highteft attack of inflammation in the fur- rounding parts; becaufe, in the fecond place, although the morbid fecretion of the palpebrae be perfectly corrected, yet, whenever the lachrymal fac remains confiderably dilated, fo that the tears are retarded in it, the further diftention and dilatation of it, and confequently the per- petual weeping of the eye, are inconveniences abfolutely inevitable. It is evident, that to avoid this difcharge of tears, it is not only ne- ceflary that the nafal canal mould be fufficiently open into the cavity of the noftrils, but alio that there Ihould be a certain proportion be- tween the caliber of this canal and the Capacity of the lachrymal fac; otherwife, if the latter exceed its ufual dimenfions, the tears poured into it from the pundla lachrymalia, as all fluids propelled through narrow tubes into large ones lofe much of the motion originally commu- nicated to them, are retarded, accumulate in the preternaturally dilated fac, and confe- quently flow back upon the eye; nor is the weight of the tears alone fufficient to make them defcend through the nafal canal and difcharge themfelves into the nofe, in the fame quantity in which they are abforbed and poured by the puntJa lachrymalia into the fac. To fulfil this indication, that is, to prevent c the