Menon Vimla, Singla M Ashok, Saxena Rohit, Phulijele Swati
Squint and Neuro-Ophthalmology Services, Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India.
J Pediatr Ophthalmol Strabismus. 2010 Sep-Oct;47(5):288-91. doi: 10.3928/01913913-20091118-07. Epub 2009 Nov 23.
To evaluate the surgical outcome of unilateral versus bilateral rectus recession for the correction of moderate exotropia.
This was a prospective study of 20 consecutive cases of intermittent exotropia ranging from 15 to 25 prism diopters (PD) randomized into two groups and operated on by a single surgeon. In the unilateral group, a recession of 7.0 to 7.5 and 8.0 to 8.5 was done for 15 to 20 PD and 21 to 25 PD of exotropia, respectively. In the bilateral group, a recession of 5.0 to 5.5 and 6.0 to 6.5 mm was done for 15 to 20 PD and 21 to 25 PD of exotropia, respectively. Surgical results of both groups were compared 3 months postoperatively.
The mean age of patients was 8.5 years in the unilateral group and 11 years in the bilateral group. The mean preoperative exotropia was 21.0 ± 3.77 PD in the unilateral group and 22.9 ± 3.03 PD in the bilateral group. The mean postoperative deviation at 3 months was 5.5 ± 4.03 PD in the unilateral group and 2.8 ± 3.91 PD in the bilateral group. Consecutive persistent small-angle esotropia was seen in one patient in the bilateral group. There was no significant incomitance at 3 months in either group.
Unilateral and bilateral rectus recession are equally effective in mild to moderate exotropia.
评估单侧与双侧直肌后徙术矫正中度外斜视的手术效果。
这是一项前瞻性研究，连续纳入20例间歇性外斜视患者，斜视度数在15至25三棱镜度（PD）之间，随机分为两组，由同一位外科医生进行手术。在单侧组中，对于15至20 PD和21至25 PD的外斜视，分别进行7.0至7.5和8.0至8.5的后徙。在双侧组中，对于15至20 PD和21至25 PD的外斜视，分别进行5.0至5.5和6.0至6.5 mm的后徙。术后3个月比较两组的手术结果。
单侧组患者的平均年龄为8.5岁，双侧组为11岁。单侧组术前平均外斜视度数为21.0±3.77 PD，双侧组为22.9±3.03 PD。单侧组术后3个月的平均斜视度数为5.5±4.03 PD，双侧组为2.8±3.91 PD。双侧组有1例患者出现持续性小角度内斜视。两组术后3个月均无明显的斜视度数差异。
单侧和双侧直肌后徙术在轻至中度外斜视的治疗中同样有效。
