The early results of silicone oil injection in the treatment of otherwise irreversible retinal detachments were encouraging both with regard to successful reapposition of the retina and to improvement in visual function. Furthermore, anatomical and visual results compared well, while the small discrepancy between them might be a reflection of irreversible retinal damage due to longstanding retinal detachment (Cleary and Leaver, 1978). Improvement in vision to a level sufficient for navigation was found to correlate well with successful reapposition of the retina with respect not only to visual acuity, but also to restoration of peripheral field. Complications occurring at the time of surgery had some influence on the operative result. When oil entered the subretinal space it always did so through large retinal tears present before surgery and held
open by retinal fibrosis. Small retinal tears caused by the injecting needle did not prevent retinal flattening, and retinal and choroidal haemorrhages were easily controlled by raising the intraocular pressure. When oil entered the anterior chamber
at surgery, in aphakic eyes, it did so as a small globule ejected from the needle tip as it passed from the pars plana sclerotomy into the anterior hyaloid. In both cases the oil globule returned behind the pupil after operation and caused no late complication, in contrast to those cases in which forward migration of oil occurred during the postoperative period (Leaver et al., 1979). Two reasons for deterioration of vision from the early postoperative level could be identified: persistent or recurrent retinal detachment, and development of late complications. Failure to reattach the retina was due in most cases to poor case selection or inadequate surgical technique. In some cases it was impossible to predict that retinal shortening was irreversible, while in others we failed to evacuate all of the retrohyaloid and subretinal fluid. In a few cases silicone oil passed under the retina through a retinal tear at surgery, and in a few instances late redetachment occurred in association with progressive retinal shortening. Whereas continuing visual deterioration is understandable when the retina remains detached, in anatomically successful cases it requires explanation. In one-third of the eyes in which the retina remained reattached throughout the follow-up period the vision deteriorated between the early and late
assessments, usually in association with late complications, in particular, cataract (Leaver et al.,1979). Indeed, a striking difference between the visual results in phakic and aphakic eyes is seen at 1 and 2 years after surgery (Tables 4 and 5) owing to the absence of this complication. The encouragingly high incidence of successful retinal reattachment and the maintenance of visual improvement in the majority of eyes in which anatomical success was achieved confirms that
silicone oil injection is an acceptable method of treating otherwise irreversible retinal detachments complicated by massive preretinal retraction. Careful assessment of results indicates that deterioration of vision due to late complications is neither as severe nor as common as previously reported, and in our opinion this method of treatment is certainly justified when the fellow eye is impaired or at risk.
The early results of silicone oil injection in the treatment of otherwise irreversible retinal detachments were encouraging both with regard to successful reapposition of the retina and to improvement in visual function. Furthermore, anatomical and visual results compared well, while the small discrepancy between them might be a reflection of irreversible retinal damage due to longstanding retinal detachment (Cleary and Leaver, 1978). Improvement in vision to a level sufficient for navigation was found to correlate well with successful reapposition of the retina with respect not only to visual acuity, but also to restoration of peripheral field. Complications occurring at the time of surgery had some influence on the operative result. When oil entered the subretinal space it always did so through large retinal tears present before surgery and heldopen by retinal fibrosis. Small retinal tears caused by the injecting needle did not prevent retinal flattening, and retinal and choroidal haemorrhages were easily controlled by raising the intraocular pressure. When oil entered the anterior chamberat surgery, in aphakic eyes, it did so as a small globule ejected from the needle tip as it passed from the pars plana sclerotomy into the anterior hyaloid. In both cases the oil globule returned behind the pupil after operation and caused no late complication, in contrast to those cases in which forward migration of oil occurred during the postoperative period (Leaver et al., 1979). Two reasons for deterioration of vision from the early postoperative level could be identified: persistent or recurrent retinal detachment, and development of late complications. Failure to reattach the retina was due in most cases to poor case selection or inadequate surgical technique. In some cases it was impossible to predict that retinal shortening was irreversible, while in others we failed to evacuate all of the retrohyaloid and subretinal fluid. In a few cases silicone oil passed under the retina through a retinal tear at surgery, and in a few instances late redetachment occurred in association with progressive retinal shortening. Whereas continuing visual deterioration is understandable when the retina remains detached, in anatomically successful cases it requires explanation. In one-third of the eyes in which the retina remained reattached throughout the follow-up period the vision deteriorated between the early and lateประเมินผล มักจะอยู่ในสมาคมมีสายภาวะแทรกซ้อน โดยเฉพาะ ต้อ (Leaver et al., 1979) แน่นอน ความแตกต่างที่โดดเด่นระหว่างผลลัพธ์ภาพตา phakic และ aphakic จะเห็น 1 และ 2 ปีหลังการผ่าตัด (ตาราง 4 และ 5) เนื่องจากการขาดงานของภาวะแทรกซ้อนนี้ เกิด encouragingly สูงของจอประสาทตา reattachment ประสบความสำเร็จและการบำรุงรักษาปรับปรุงภาพในส่วนใหญ่ของตาที่บรรลุความสำเร็จกายวิภาคที่ยืนยันฉีดน้ำมันซิลิโคนเป็นวิธียอมรับของรักษามิฉะนั้นให้จอประสาทตาหน่วยมีความซับซ้อน โดย retraction ขนาดใหญ่ preretinal ระวังการประเมินผลลัพธ์บ่งชี้ว่า ของวิสัยทัศน์เนื่องจากภาวะแทรกซ้อนล่าช้าไม่เป็นรุนแรง หรือเป็นทั่วไปรายงานว่า ก่อนหน้านี้ และในความคิดของ วิธีการรักษานี้เป็นแน่นอนธรรมเมื่อตาเพื่อนพิการ หรือ ที่มีความเสี่ยง
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