Manual of the Diseases of the Eye for Students and General Practitioners

Manual of the Diseases of the Eye for Students and General Practitioners

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 edition. Excerpt: ... Congenital and Juvenile. 3. Traumatic. In patients under thirty-five all cataracts are of sq/fc consistence throughout and white in color; such cataracts have no hard nucleus and are known as soft cataracts. After this period, the nucleus becomes hard and of a yellowish tint, and the lenticular opacity is known as hard cataract. Etiology.--According to etiology, cataract may be classified as: 1. Congenital, due to faulty development or intra-uterine inflammation of the eye. To this class belong the anterior and posterior polar, lamellar, and occasionally complete cataract. 2. Senile; this is the most common form. It usually appears after the age of fifty. The real cause is unknown. Heredity has some influence. 3. Due to General Diseases: diabetes and less frequently nephritis, gout, and general arterial disease. 4. Traumatic, by the production of an opening in the capsule, thus allowing the lens to absorb aqueous humor; occasionally by mere concussion. 5. Due to Ocular Diseases, causing complicated or secondary cataract; the most common examples are severe forms of ulcerative keratitis, ' iridocyclitis, choroiditis, myopia of high degree, glaucoma, and detachment of the retina. Symptoms.--There is (1) diminished acuteness of vision, depending upon the situation and the kind of cataract. It is greatest when the opacity is central and diffuse, and least when the cataract is peripheral. When central, the patient sees best in dim light--with dilatation of the pupil. The interference with vision increases with the progress of the cataract, until finally there is mere perception of light. (2) The patient complains of seeing spots which occupy a fixed position in the field. (3) Occasionally there is annoying diplopia or polyopia, due to irregular...show more

Product details

  • Paperback | 126 pages
  • 189 x 246 x 7mm | 240g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236504550
  • 9781236504555