Simultaneous rupture of the choroid and paretic mydriasis without paresis of accommodation / by Alexander Duane.

  • Duane, A. (Alexander), 1858-1926.
Date:
[1901]
Catalogue details

Licence: In copyright

Credit: Simultaneous rupture of the choroid and paretic mydriasis without paresis of accommodation / by Alexander Duane. 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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    In my case no notching of the sphincter border could be made nut. The contusion may, however, have caused a Ulceration of the sphincter too minute to be discoverable and yet sufficiently great to impair the contractility of the muscle. This, I think, more likely than that the oculomotor nerve-endings in the iris were paralyzed by the blow. A contusing force sufficiently great to produce actual permanent ])aralysis of these nerve-endings would be apt to leave some paresis of accommodation as well. Tlie accommodation, how- ever, here was intact. That, nevertheless, a temporary paretic mydriasis may be caused by a concussion which does not produce a laceration of the sphincter, 1 can confirm from my personal experience. Some years ago, while playing tennis, I was struck in the eye with a ball flying with great force. The immediate result was severe pain, marked mydriasis, and considerable blurring of vision. All these symptoms passed away in the course of a few hours, leaving the iris as mobile as ever. Whether this transitory paral3'sis of the sphincter was associated Avith an equally transitory paralysis of accommodation I could not tell, as the sight was too much affected for me to settle this question satis- factorily.