Problems of chorioretinal venous anastomosis by laser for treatment of nonischemic central retinal vein occlusion.

OBJECTIVES

Evaluate the efficacy of chorioretinal venous anastomosis in patients with nonischemic retinal vein occlusions with progressive visual loss and to concentrate on complications.

DESIGN

Case series of 6 patients, retrospective study. Six patients with nonischemic central retinal vein occlusions and progressive visual loss. Laser photocoagulation was performed to create a chorioretinal venous anastomosis to be able to supply venous blood to the choroid, bypassing the occlusion. Visual acuity, funduscopic appearance and fluorescein angiographic appearance were determined.

RESULTS

Two patients showed a chorioretinal anastomosis (33%), whereas in the other 4 patients the anastomosis could not be created. Yet 1 patient consequently had a neovascular tuft under the laser site. These new vessels caused minor vitreous hemorrhage and a tractional membrane which regressed after 10 months.

CONCLUSION

The utilization of a chorioretinal venous anastomosis by laser as a therapeutic modality should be further questioned and thoroughly evaluated and caution must be exercised to avoid vision-threatening complications.