[Hemodynamic findings after retinal interventions].

In this study we tried to find out if the hemodynamic results could help us explain why the visual situation after retinal surgery often becomes unsatisfactory despite good anatomical results. Using Ulrich's methods (oculo-oscillodynamography), we measured the hemodynamic parameters-especially ciliary perfusion pressure and the volume of blood flow--in 40 patients after retinal surgery. One of our results is remarkable: there is a direct relationship between the amount of scleral buckling and a disturbance in the hemodynamic parameters. Otherwise, we found that hemodynamic disturbances after vitreous surgery (vitrectomy, silicone oil implant or gas) are less dramatic than after buckling methods or in connection with them. Also, the hemodynamic disturbance begins before retinal surgery, obviously according to the stage of ablation: with or without macular involvement and irrespective of the time of retinal detachment. After all we have demonstrated in this study, we have reason to believe that a disharmony in the ocular hemodynamics causes disappointing visual results, often seen after retinal surgery.