方法：对具有以下特点：(1)病程大于6mo；(2)裂孔位于5：00～7：00的视网膜周边部或者在多发视网膜裂孔中有开放裂孔位于5：00～7：00的视网膜周边部；(3)视网膜脱离范围超过270度、并且伴有脱离区视网膜条索样增殖的19眼特殊类型视网膜脱离，采取玻璃体切割联合下方巩膜外垫压治疗，观察视网膜解剖复位和视功能恢复情况。

结果：视网膜解剖复位19眼； 最佳矫正视力均有不同程度提高，其中0.01～0.1有5眼； 0.12～0.3有9眼； ≥0.4有5眼。

结论：玻璃体切割联合下方巩膜外垫压是治疗病程大于6mo、视网膜裂孔位于5：00～7：00的视网膜周边部或者在多发视网膜裂孔中有开放裂孔位于5：00～7：00的视网膜周边部、视网膜脱离范围超过270度、并且伴有脱离区视网膜条索样增殖这类特殊视网膜脱离的有效方法。

METHODS: Nineteen eyes of special retinal detachment had following features: 1)the course was more than 6mo; 2)there were at least one hole located in the 5:00-7:00 of the marginal retina; 3)the detachment range of retina more than 270 degrees and retinal proliferation in retinal detachment. The 19 eyes who received vitrectomy combined with inferior scleral buckling, retinal anatomic reattachment and visual function recovery was observed.

RESULTS: Among these 19 eyes, all eyes retinal anatomic reattachment and best corrected visual acuity(BCVA)was improved in various degrees. The BCVA was 0.01-0.1 in 5 eyes, 0.12-0.3 in 9 eyes, and ≥0.4 in 5 eyes.

CONCLUSION: It is an effective method to vitrectomy combined with inferior scleral buckling for the special kind of retinal detachment which has following features: 1)the course was more than 6mo; 2)there were at least one hole located in the 5:00-7:00 of the marginal retina; 3)the detachment range of retina more than 270 degrees and retinal proliferation of cable in retinal detachment.