. Refraction and how to refract : including sections on optics, retinoscopy, the fitting of spectacles and eye-glasses, MUSCLES. 95 deviation or angle of the strabismus; this angle beingformed by the visual axis with the direction of the normalvisual line. The degree mark on the arc is in front of tiie. Fk;. 159. optic axis and not the visual axis, but for purposes ofapproximation they are considered as the same. Treatment of Strabismus.—.\s ametropia is the dhieffactor in the cause of squint, this cause must be promptly 196 REFRACTION AND HOW TO REFRACT. removed by the use of correcting
. Refraction and how to refract : including sections on optics, retinoscopy, the fitting of spectacles and eye-glasses, MUSCLES. 95 deviation or angle of the strabismus; this angle beingformed by the visual axis with the direction of the normalvisual line. The degree mark on the arc is in front of tiie. Fk;. 159. optic axis and not the visual axis, but for purposes ofapproximation they are considered as the same. Treatment of Strabismus.—.\s ametropia is the dhieffactor in the cause of squint, this cause must be promptly 196 REFRACTION AND HOW TO REFRACT. removed by the use of correcting glasses. The correctionof the ametropia means four essentials : 1. In young subjects the eyes must be put at rest, andkept at rest for two, three, or four weeks, with a reliablecycloplegic and dark glasses. Preference is given toatropin in each instance, the writer considering it folly touse homatropin in such cases. 2. During the use of the cycloplegic, the lenses whichcorrect the ametropia are selected with care and the greatestprecision, by every known means to this end ; and justhere is the place of all places to use the retinoscope, asmost cases of strabismus appear in children, and, too, thesquinting eye often being amblyopic, can not assist in theselection of the glass. 3. The correcting gla
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