This is a report of experiences with the cryotherapy of senile retinoschisis. In spite of the prophylaxis retinal detachment occurred in 2 out of 30 eyes. The critical question, whether the prophylactic treatment is worthwhile or not, can be positively answered, when compared to the results of non treated retinoschisis (Shea et al., Okun and Cibis). A macular puckering was not seen.