[Senile retinoschisis with tearing of the deep layer--classification and pathogenic hypotheses]

The observations have been made on 52 eyes with senile retinoschisis with tearing of the deep layer. These principle studies are the aspect of tearing, in order to classify and discuss the pathogenic hypotheses. Seven types of tearing are presented. Their modes of formation seem different. We established a pathogenic classification of these tears. The risk of operation on a secondary retinal detachment is always a subject of discussion even if the symptomatic detachment may be considered very rare. From these seven observation of schisis detachment, there is proposed a pathogenic hypothesis. The vitreous have played the principal role in making a traction on the edge of the deep tears where sometimes the retinoschisis is not formed. It is recommended to observe and analyse systematically the tearing of the retinoschisis external layer.