May's Manual of the Diseases of the Eye

May's Manual of the Diseases of the Eye

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 edition. Excerpt: ...will, of course, modify this correcting lens. Glasses should not be prescribed until all signs of irritation have disappeared--generally at the end of a month. Changes in refraction may continue for several months. The aphakial eye presents, besides hyperopia and loss of accommodation, a deep anterior chamber and usually a tremulous iris; the images PROGNOSIS IN CATARACT EXTRACTION. 199 normally seen on the anterior and posterior surfaces of the lens are absent. Prognosis.--A. favorable result and useful vision follow cataract extraction in the great majority of uncomplicated cases (ninety-five per cent.); there is very often excellent sight, and occasionally perfect vision. The prognosis is dependent not only upon skilful operation, but upon careful selection, and upon exclusion of those complicated cases which cannot be improved by an operation, no matter how successful. Hence it becomes important to diagnose properly the condition of the other ocular structures, and especially that of the retina. This is done by testing the field of vision with the candle for light perception and light projection. There should be a good field and good perception and projection of light. Projection is tested by throwing light from the mirror of the ophthalmoscope upon the upper, lower, inner, and outer portions of the pupil; there is good projection, if, without moving the eyes, the patient is able to state correctly the direction from which the light comes. This test may also be applied with the lighted candle made to approach the eye from various directions, at a distance of one metre and also at a greater distance--three to four metres. Although the cataract be fully matured, there should be good perception of light, even with faint illumination; more

Product details

  • Paperback | 134 pages
  • 189 x 246 x 7mm | 254g
  • United States
  • English
  • black & white illustrations
  • 1236895207
  • 9781236895202