The refraction of the eye; including a complete treatise on opthalmometry; a clinical text-book for students and practitioners . R. E, Fig. 85. L. E. Ophthalmoscope. — M. 150 D. at 75° and H. D. at 165°right eye ; M. 7 D. at 105° and M. 3 D. at 15° left eye. Second test: two days later the ophthalmometer gave thesame reading as at first. T> st i;ir<l* <iml trial lenses. — R- v- = zh- U - W. + D. cyl., 75° - 1 D. cyl., 165°. =2V« = -i2o°6 cyl., 15°. This last glass was ordered, the cross-cylinder in the righteye being converted into a sphero-cylinder; a plus s
The refraction of the eye; including a complete treatise on opthalmometry; a clinical text-book for students and practitioners . R. E, Fig. 85. L. E. Ophthalmoscope. — M. 150 D. at 75° and H. D. at 165°right eye ; M. 7 D. at 105° and M. 3 D. at 15° left eye. Second test: two days later the ophthalmometer gave thesame reading as at first. T> st i;ir<l* <iml trial lenses. — R- v- = zh- U - W. + D. cyl., 75° - 1 D. cyl., 165°. =2V« = -i2o°6 cyl., 15°. This last glass was ordered, the cross-cylinder in the righteye being converted into a sphero-cylinder; a plus sphere with 198 THE REFRACTION OF THE EYE a minus cylinder, in order that the cylinder should correspondin character and axis with the cylinder in the opposite : — + D. - D. cyl., 165° right eye; - 4 D. - 2 D. cyl., 15° left eye. These glasses gave immediate relief from her asthenopic symp-toms. After a few weeks time she dropped out from underobservation. In this case, as in the one reported immediately precedingit, the cross-cylinder was converted into a sphero-cylinder, plussphere w
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Keywords: ., bookauthordavisa, bookcentury1900, bookdecade1900, booksubjecteye
