The refraction of the eye : a manual for students / by Gustavus Hartridge.

  • Gustavus Hartridge
Date:
1894
Catalogue details

Licence: Public Domain Mark

Credit: The refraction of the eye : a manual for students / by Gustavus Hartridge. Source: Wellcome Collection.

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    meridians, we put up the combination in a spectacle trial frame, and if we now get only a slightly reversed shadow in every direction, the glasses are assumed to be the right ones, and we proceed to confirm it by trying the patient at the distant type, making any slight alterations that may be necessary. I cannot too strongly recommend the use of atropine in solution, gr. iv to 5j. frequently dropped into the eyes for three days prior to the examination, so as thoroughly to relax the accommodation. It can be used without fear, and without a great amount of in- convenience in most young people under twenty years of age. I have worked out a great many cases of astigmatism, and feel more and more the necessity of using this drug to enable one to arrive at exact results. I might almost say that I have never seen a young person whose astigmatism has been worked out without atropine wearing the right correction; and the inconvenience entailed upon the patient for two weeks by its use is not to be compared to the trouble and asthenopia from which he is so liable to suffer if the glasses worn are not the proper ones. In old persons with small pupils, in whom it is difficult to see the movements of the shadow, and in whom solutions of atropine of the ordinary strength are dangerous, on account of the occasional occurrence of that much-dreaded disease glaucoma,^' which has been clearly traceable to its use, the pupil may be conveniently dilated with homatropine in solution, gr. ij to 3] of water, or with an exceedingly weak solution of atropine ^^g- gr. to 5] of water, or with a