Objective To evaluate the effectiveness and safety of orbital decompression for compressive optic-neuropathy. Methods Fourteen eyes of twelve cases with Graves opthalmopathy and compressive optic-neuropathy undergone two orbital walls decompression with the follow-up period of more than 3 months were analyzed. Results The effect of complete closure of palpebral fissure was attained in all of the postoperative eyes and the visual acuity was increased in eleven eyes, remained no change in two eyes and decreased in one eye. The mean value of the recession of exophth almic eyes after operation was mean 4.0 mm. Conclusion Two or bital walls decompression is an effective method for compressive optic-neuropathy in Gaves ophthalmopathy. (Chin J Ocul Fundus Dis, 2001,17:303-304)