Muscular asthenopia and its treatment by graduated tenotomy / by Charles Hermon Thomas.

  • Thomas, Charles Hermon.
Date:
[1894]
Catalogue details

Licence: Public Domain Mark

Credit: Muscular asthenopia and its treatment by graduated tenotomy / by Charles Hermon Thomas. 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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    mus instraments are altogether unsuitable by reason of their coarseness and clumsiness and should never be employed. A study of nearly ten years faithfully pursued in all cases of asthenopia coming under my care has lead me to the fol- lowing conclusions :— Muscular asthenopia may present symptoms of all grades of importance, from the slightest to the most serious. The muscular conditions in every case should, as a matter of routine, be as carefully investigated as are the media, eye- ground, refraction and amplitude of accommodation. As in refractive, so in muscular asthenopia the gravity of the symptoms bears no constant relation to the amount of the physical defect. It is impossible to predict with any consid- erable degree of definiteness, the result of correction of either refractive or muscular error. As much and very much the same kind of relief is to be expected from the correction of the muscular anomalies as from the correction of errors of refraction and accommodation, as might be expected from the similarity in the symptoms which these conditions respect- ively cause. During the earlier years of my study of these cases, I gave considerable attention to the graver neuroses—especially epi- lepsy—in connection with muscular anomalies; continuing the observation of a series of epileptic cases throughout a period of about five years. The results obtained in this series were altogether negative, not one recovering. With expecta- tions of cure of epilepsy greatly abated, I nevertheless con- sider it proper to remove eye-strain of muscular origin in this affection as I would in any other condition ; and for the additional sufficient reason that sound conservatism in the management of epilepsy calls for the removal of all possible sources of peripheral irritation. 1807 Chestnut Street.