Diseases of the eye and ophthalmoscopy : a handbook for physicians and students / by A. Eugen Fick ; authorized translation by Albert B. Hale.

  • Adolf Gaston Eugen Fick
Date:
1896
Catalogue details

Licence: Public Domain Mark

Credit: Diseases of the eye and ophthalmoscopy : a handbook for physicians and students / by A. Eugen Fick ; authorized translation by Albert B. Hale. Source: Wellcome Collection.

    95/492 (page 95)
    the left inferior oblique, if they diverge. By changing the double prism the right eye may be similarly tested. As the last trial is conducted at a distance of 50 cm., it is well to repeat the preceding prism tests for equilibrium, at the same (near) distance, using instead of the candle a small white cross on a black o-round. The results thus found may or may not coincide with those found at 6 m. These examinations should be supplemented by testing in each eye the strength of the prism that can be over- come by adduction (base out), and by abduction (base in), before double vision occurs. Muscular power varies, of course, in different eyes and on different occasions, but adduction will be from 2ß° to 50° ; abduction from 5° to 10°.—H.] I