Atlas of the external diseases of the eye : including a brief treatise on the pathology and treatment / by O. Haab ; Authorized translation from the German, edited by G.E. de Schweinitz.

  • Haab O. (Otto), 1850-1931.
Date:
1899
Catalogue details

Licence: Public Domain Mark

Credit: Atlas of the external diseases of the eye : including a brief treatise on the pathology and treatment / by O. Haab ; Authorized translation from the German, edited by G.E. de Schweinitz. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

    264/312 (page 196)
    Such minute lacerations often produce a delicate rosette- like opacity (seen by transmitted light) in the posterior cortex of the lens, and the cataract may remain stationary for a time, or even diminish ; but, as ii rule, it becomes progressive and goes on to total opacity. ^Secondary glaucoma is an important complication of traumatic c,ataract. As soon as the swelling of the lens becomes excessive there is danger of glaucoma, especially in old people. The increase in tension is at once indi- cated by cloudiness of the cornea, and, unless the pressure is relieved by paracentesis corneai and evacuation of the cataractous mass, vision is gradually destroyed. Cataract is sometimes attended with inflammation, the anterior chamber becoming contaminated at the time of the injury and setting up an iritis or iridocyclitis. Ad- hesions are formed between the lens and the iris or ciliary body, giving rise to cataracta accreta, ^\\\\c\\ does not lend itself readily to operation. 4. Complicated cataract occurs in consequence of other diseases of the eye, such as acute iritis and irido- cyclitis, especially the ])urtdent forms (crce])ing ulcer); chronic iridochoroiditis with opacities in the vitreous, separation and ])igmentary degeneration of the retina, and the end-stage of glaucoma. Persons with a high degree of myopia show a certain tendency to cataract, especially in advanced life. Com])licated cataract is recognized by its abnormal, dirty-yellow or, if calcification has taken place, chalky color, by adherence of the iris, by thickening of the capsule, trcmulousness, etc., and especially by the loss of function. In normal cataract, as has been stated (see p. 57), the ])ower of locating a candle in the dark is always retained. In addition to the causes of cataract which have been mentioned (senility, traumatism, etc.), wc recognize dia- betes and albuminuria and hereditary disposition. In the diagnosis the following points are to be borne in mind: Inci])ient cataract must never be diagnosed until the eye ‘has been examined by transmitted light.