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[Retinal vein occlusion. I. Pathogenesis of circulatory changes]
1Ocní klinika LF UP, Olomouc.
In the pathogenesis of macular edema in venous occlusion of the retina, the majority of authors considers the high intracapillary pressure to be the decisive factor. The author's explanation is somewhat different and is based on two assumptions. The existence of the vascular autoregulatory mechanisms of the retina and the so-called disproportion between the arterial and the venous volume. When the critical level of the disproportion of the arterial and the venous volume is surpassed, the retinal autoregulation begins to fail which manifests itself by a marked retinal edema and an essential decrease in visual acuity.
In the pathogenesis of macular edema in venous occlusion of the retina, the majority of authors considers the high intracapillary pressure to be the decisive factor. The author's explanation is somewhat different and is based on two assumptions. The existence of the vascular autoregulatory mechanisms of the retina and the so-called disproportion between the arterial and the venous volume. When the critical level of the disproportion of the arterial and the venous volume is surpassed, the retinal autoregulation begins to fail which manifests itself by a marked retinal edema and an essential decrease in visual acuity.