Eight eyes were examined histologically after silicone oil injection. Intraretinal deposits suggestive of silicone were not present in attached retinas, but were frequently observed in detached retinas when subretinal silicone occurred. This may possibly be due to defects in the horizontal conducting structures of the retina such as those occurring in persistent detachment with disorganization of the retina. Morphologically, the retina was essentially normal 3.5 years after the silicone injection. This observation contradicts the idea that silicone oil has a toxic effect.
Silicone oil injection was used in the treatment of 300 selected cases of complicated retinal detachment (after PVR, trauma, giant tears, macular holes, proliferative diabetic retinopathy) and in 7 prephthisical eyes. The anatomical and visual results are analyzed in a retrospective study. Total or partial reattachment was seen in 52% and 27% of the cases reexamined one year postoperatively. At least a navigating visual acuity was achieved in 54%. The results in the different indication groups are discussed. The silicone oil injection was performed after mobilization of the retina by means of pars plana vitrectomy and periretinal surgery.
In a retrospective study, the results of pars plana vitrectomy in treatment of injuries with intraocular foreign bodies were described. The patient material was subdivided into five different groups. In 41.6% of the cases, practical blinding could not be prevented. A visual acuity of 0.2 and better was present in 26.6% of the cases. The preoperative (45%) and postoperative (30%) traumatic retinal detachment have an extremely unfavorable prognosis with a reattachment rate of 40 or 21% respectively. The results in the treatment of injuries with magnetic splitters and their sequelae are very much better than those with nonmagnetic foreign bodies. The gunshot and air rifle pellet injuries were the most unfavorable group.
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