. The refraction of the eye; including a complete treatise on ophthalmometry; . th glasses.—July 2, 1895, Ida S., agedthirty years, in good health, but has suffered considerably withheadaches since a schoolgirl. She has had numerous glasses,but none have been comfortable or relieved the headaches. Ophthalmometer.—Astigmatism with the rule, ID., axis75°+ or 165°- right eye ; 3 D., axis 120°+ or 30°- left eye. Test cards and trial lenses. — R. y. =||_: ffW.+.25D.+ .50D. cyh, 75°. L. V. =2^^ : I^W. + cyl., 120°,30°. Reads Jaeger No. 1 from 5 to 20 inches. Ophthalmoscope. —YL. ID.
. The refraction of the eye; including a complete treatise on ophthalmometry; . th glasses.—July 2, 1895, Ida S., agedthirty years, in good health, but has suffered considerably withheadaches since a schoolgirl. She has had numerous glasses,but none have been comfortable or relieved the headaches. Ophthalmometer.—Astigmatism with the rule, ID., axis75°+ or 165°- right eye ; 3 D., axis 120°+ or 30°- left eye. Test cards and trial lenses. — R. y. =||_: ffW.+.25D.+ .50D. cyh, 75°. L. V. =2^^ : I^W. + cyl., 120°,30°. Reads Jaeger No. 1 from 5 to 20 inches. Ophthalmoscope. —YL. ID. right eye; H. D. at 30°and M. D. at 120° left eye. Second test: this resulted in the patient accepting exactlythe same glasses as at the first test, and they were ordered: — + .25 D. + .50 D. cyl., 75° right eye; D. + D. cyl., 120° left eye. ILLUSTRATIVE CASES 193 In this case, as the mixed astigmatism was not of largeamount and was equally divided between hypermetropia andmyopia, I converted the cross-cylinder into a sphero-cylinder,. 120
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