Refraction of the eye : its diagnosis and the correction of its errors / by A. Stanford Morton.

  • Morton, A. Stanford.
Date:
1897
Catalogue details

Licence: Public Domain Mark

Credit: Refraction of the eye : its diagnosis and the correction of its errors / by A. Stanford Morton. Source: Wellcome Collection.

    14/122 (page 2)
    out from the symptoms the nature of the disease in prefer- ence to the method of naming the disease and then describ- ing the symptoms accompanying it. In making an estimation of the refractive character of an eye, it is especially necessary to proceed systematically. On a patient complaining of bad sight the vision of each eye must always be tested separately, and we should examine him somewhat in the following manner: 1. Listen carefully to the nature of his complaint. 2. Test the near and distant vision without glasses. 3. Estimate the refractive character of the eye by either {a) Ophthalmoscopy, (&) Retinoscopy ; both of which are objective methods. 4. Examine the eye with an ophthalmoscope in order to ascertain whether any lesion other than that of refraction exists. 5. Test the distant and near vision with the glasses for whose use the previous examination has indicated the necessity. Two methods of notation are at present in vogue {vide Chap. III.). The new system of numeration is the one which is now almost universally employed, and it has been adopted in the text. The approximately corresponding measurements in EngHsh inches have, however, been given in brackets for the convenience of those who prefer the old method. Only so much ophthalmoscopy has been introduced as was necessary to explain the phenomena of refraction.