Howcroft M J, Shea M
Can J Ophthalmol. 1982 Dec;17(6):256-61.
Of 28 patients with a foreign body in the posterior segment, 24 were managed primarily and 4 had been referred for treatment of associated injuries or complications after extraction. There were 19 magnetic and 9 nonmagnetic (including 6 copper-containing) foreign bodies. Preoperative localization was achieved mainly by visual and radiologic (Sweet's) methods, supplemented by computer-assisted tomography and ultrasonography. The magnetic foreign bodies were extracted through the pars plana or sclera. The nonmagnetic foreign bodies were extracted mainly by a two-instrument vitrectomy technique through the pars plana. Secondary procedures included vitrectomy, lentectomy, scleral buckling and dissection of preretinal membranes. In a follow-up period ranging from 1 to 53 (average 14) months the overall salvage rate (final visual acuity 6/60 [20/200] or better) was 46%. Four eyes were enucleated.
在28例眼后段有异物的患者中，24例首先接受了治疗，4例在取出异物后因相关损伤或并发症而被转诊治疗。有19个磁性异物和9个非磁性异物（包括6个含铜异物）。术前定位主要通过视觉和放射学（斯威特氏）方法实现，并辅以计算机断层扫描和超声检查。磁性异物通过睫状体平坦部或巩膜取出。非磁性异物主要通过经睫状体平坦部的双器械玻璃体切除术取出。二次手术包括玻璃体切除术、晶状体切除术、巩膜扣带术和视网膜前膜剥离术。在1至53个月（平均14个月）的随访期内，总体挽救率（最终视力6/60[20/200]或更好）为46%。4只眼被摘除。
