Text-book of ophthalmology . patients urine shouldbe made in every case of retinitis. All forms of kidney disease that result in albuminuria may be complicated with ret-init is, but the one most frequently thus complicated is the atrophic kidney. The severityof the retinitis bears no fixed proportion to the intensity of the kidney disease nor tothe amount of albumin in the urine. The like is true of the subsequent course; theretinitis may improve while the kidney lesion grows worse, or vice versa. Nevcrthe-less, retinitis albuminurica is, on the whole, of evil prognostic significance. Even ifi
Text-book of ophthalmology . patients urine shouldbe made in every case of retinitis. All forms of kidney disease that result in albuminuria may be complicated with ret-init is, but the one most frequently thus complicated is the atrophic kidney. The severityof the retinitis bears no fixed proportion to the intensity of the kidney disease nor tothe amount of albumin in the urine. The like is true of the subsequent course; theretinitis may improve while the kidney lesion grows worse, or vice versa. Nevcrthe-less, retinitis albuminurica is, on the whole, of evil prognostic significance. Even ifit does occur sometimes with benign kidney lesions (e. g., with scarlatinal nephritisand the renal affection of pregnancy), yet it far more frequently is associated with theserious ohronic cases, and it is a matter of experience that most patients suffering withretinitis albuminurica SUCCUmb from their renal disorders within a few years. (For theconnection between the retinitis and the renal disorder, see page 28.) PLATE [Fig. 251.—Changes in Retinal Vessels. (After Wiirdemann in Posey and Spiller.) A, Embolism central artery; partial, affecting only inferior branch (Haab). B, Embolism centralartery; total within nerve; a cilio-retinal vessel supplies a small area of retina in which function ispreserved (Wurdemann). C, Thrombosis of central vessels from mumps (Wardemann). D, Same casesix months later, showing sclerosis and atrophy (Wurdemann). E, Haemorrhages from retinal vessels{Magnus). F, Perivasculitis luetica (Magnus).—D.] DISEASES OF THE RETINA 579 In nephritis disturbance of vision may occur also under the form of a transitoryblindness without any retinitis being present. The patient declares that everythingsuddenly becomes dark before his eyes; the disturbance of sight increases so quicklythat the blindness gets to be complete within a few hours or a day. Even, however,when the blindness is absolute, the results of examination of the eye are usually nega-tive.
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