Text-book of ophthalmology . larly in a largecircle surrounding the macula. In the macula itself is found quite a large exudate having a structurelike that of the small dots. 4. Retinitis Diabetica.—This is characterized in many cases by the presence ofsmall, brilliantly white spots in the retina, which chiefly occupy the region of the mac-ula lutea and its vicinity, without, however, presenting a stellate arrangement, as inalbuminuric retinitis (Fig. 253). Sometimes by the confluence of small dots one ortwo large patches are found, which show by their crenated border thai they are com-posed o
Text-book of ophthalmology . larly in a largecircle surrounding the macula. In the macula itself is found quite a large exudate having a structurelike that of the small dots. 4. Retinitis Diabetica.—This is characterized in many cases by the presence ofsmall, brilliantly white spots in the retina, which chiefly occupy the region of the mac-ula lutea and its vicinity, without, however, presenting a stellate arrangement, as inalbuminuric retinitis (Fig. 253). Sometimes by the confluence of small dots one ortwo large patches are found, which show by their crenated border thai they are com-posed of smaller spots. Between the white patches lie punctate extravasations ofblood. The rest of the retina is transparent, and the papilla, too, is unaltered. In other cases this characteristic picture is not present, in fact, diabetic, retinitismay actually appear under the guise typical of albuminuric retinitis [or closely resemblea retinitis circinata (see page 584). Very rarely in young diabetics, especially when PLATE [Fig. 255.—Infl \ MMATIONf >k the Rktina. (After Wiirdemann in Posey jind Spiller.) A, CEdema in pernicious anaemia (Oliver;. B, Leuchsemic retinitis (Oliver). C, Albuminuric retinitisand neuritis of pregnancy (Wiirdemann). D, Albuminuric retinitis in the negro (Wiirdemann). E,Syphilitic retinitis (Haab). F, Atrophy of retina, chorioid, and nerve following chorio-retinitis luetics(.Oeller).— DISEASES OF THE RETINA 581 nearing death, retinal liphcpmia is found, i. e., a condition in which on account of the largeamount of fat in the blood, the retinal vessels appear reddish-white or pure white.—D.] Retinitis is also observed in oxaluria. 5. Retinitis Leuchaemica.—In this, superadded to the general symptoms of inflam-mation of the retina (namely, retinal cloudiness and haemorrhages), there is found, asa characteristic feature, a light hue of the blood in the retinal vessels, which ordina-rily are greatly dilated. Furthermore, since in leuchaemia
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