. The refraction of the eye; including a complete treatise on ophthalmometry; . ia.—May 9, 1893, Hannah D., aged twenty-five, hasgood general health, but has had weak eyes since a child. Afterany close work she has headaches and pains in the eyes, espe-cially the left eye. Ophthalmometer. — Astigmatism with the rule, 2 D,, axis75° + or 165° - right eye ; 2 D., axis 120° + or 30° - left eye. Test cards aiid trial lenses. — R. V. =f^- :f§ cyl., 75°.L. V. = f^ - : IIW. + D. cyl., 120°. Reads Jaeger No. 1 at 5J inches. Ophthalmoscope. — H. 2 D. at 165° and emmetropia at75° right ey
. The refraction of the eye; including a complete treatise on ophthalmometry; . ia.—May 9, 1893, Hannah D., aged twenty-five, hasgood general health, but has had weak eyes since a child. Afterany close work she has headaches and pains in the eyes, espe-cially the left eye. Ophthalmometer. — Astigmatism with the rule, 2 D,, axis75° + or 165° - right eye ; 2 D., axis 120° + or 30° - left eye. Test cards aiid trial lenses. — R. V. =f^- :f§ cyl., 75°.L. V. = f^ - : IIW. + D. cyl., 120°. Reads Jaeger No. 1 at 5J inches. Ophthalmoscope. — H. 2 D. at 165° and emmetropia at75° right eye; H. .50 D. at 120° and H. 2 D. at 30° lefteye. Two days later a second test was made. The ophthalmom-eter read exactly the same, both as to the axis and amountof the astigmatism in the left eye as at the first test; andthe same axis, but .50 D. more in amount for the righteye. ILLUSTRATIVE CASES Test cards and trial lenses. — R. V. = li - : 1^-W. + 2 D. cyl., 75°. L. V. = f^ - : 1^ W. + .50 D. + D. cyL, 120< Reads Jaeger No. 1 at 51 inches. 91. R. E, L. E. Fig. 46. This last glass was ordered and has been worn constantlysince, with relief from asthenopic symptoms. Case XXXII. Compound hypermetropic astigmatism agairistthe rule iii one eye; Large amount of hypermetropia in the othereye; Marked asthenopia; Relief with the use of glasses. —December 17, 1895, Frances D. M., aged twenty-one, in poorgeneral health, and is very nervous and easily excited or de-pressed. Her mother was a very nervous woman also. Thepatient suffers much from fatigue and often has headaches,and her eyes pain after any close work or reading. There isa mild conjunctivitis present. Ophthalmometer.—Astigmatism against the rule, .25 D.,axis 30° + or 120° — right eye ; astigmatism with the rule,.50 D., axis 90° -f- or 180° - left eye. 92 THE REFRACTIOX OF THE EYE Test cards and trial lenses. — I^- ^- = t¥ • It W. + 3 D. + .75 D. cyL, 30°. Reads Jaeger No. 1 at 6 i
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