Use Of Ultrasound Biomicroscopy For Silicone Oil Filled Eyes

[Objectivel:To observe ultrasound biomicroscopy(UBM) image characteristics of eyes taken pars plana vitrectomy with Silicone Oil tamponade.To investigate clinical value of ultrasound biomicroscopy in the operation of Silicone Oil tamponade.[Methods]:154Cases(154eyes) silicone oil tamponaded eyes(＞3 months) were measured by UBM and the images were analyzed.Following conditions of the eyes taken pars plana vitrectomy with Silicone Oil tamponade were recorded:(1)emulsification,distribution and tissues tincture(2) proliferation of anterior eye segment;(3) tissue changes of the anterior eye segment of chronicity ocular hypotension.[Results]:1.Ocular hypertension happened to 25 eyes among the 154 silicone oil tamponaded eyes.Intraocular pressure advanced at 3-24 months after the pars plana vitrectomy with Silicone Oil tamponade.The average time was 10.7 months.Among the total,there was 4 eyes took place within 3 months,10 eyes happened within 6 months,16eyes took place within 12 months,and 25eyes happened within 24 months.The incidence rate of ocular hypertension rose with the time of silicone oil tamponade.2.Emulsification of silicone oil happened to 86 eyes among the 154 silicone oil tamponaded eyes.Ocular hypertension took place in 23 eyes among them after more than 3 months,it occupied 23%.Another 68 eyes free of emulsification,ocular hypertension happened to 2 eyes,it occupied 2.9%.There were significant difference between this two groups(X2=15.822,P＜0.05).3.Ocular hypotension happened in 16 eyes among the 154 silicone oil tamponaded eyes.Decrease of intraocular pressure appeared at 1-6 months after the surgery,the average time was 2.1 months.5 eyes among them within 1 month,8 eyes happened after 1-2 months,2 eyes happened after 2-3 months,1 eye happened after 3-6 months.The crest-time of ocular hypotension was within 2 months.4.anterior proliferative vitreoretinopathy(aPVR) happened to 17 eyes among the 154 silicone oil tamponaded eyes,it occupied 11%. Among them 9 eyes were slight anterior Vitreous Body proliferation,3 eyes were retinal circumduction(aPVRC4),5 eyes were anterior displacement(aPVRC5).5.There were 16 eyes of ocular hypotension,14 eyes among them happened ciliary choroidal detachment(14/16=88%).11 eyes among them had aPVR(11/16=69%),the proliferative scope was more than 90 degree. 6.Anterior segments of ocular hypotension after silicone oil tamponade were measured by UBM,The comparision was took between sick eye and opposite normal eye.The result was that there were significant difference between ocular hypotension eye and the opposite normal eye(t=37.218,42.554,23.478,P＜0.05)[Conclusions]:1.Occurrence and graveness of ocular hypertension after silicone oil tamponade had forward direction with the time of silicone oil persistence.Extraction of silicone oil as early as possible to the patients with silicone oil emulsification was effective step.2.UBM played an important part in observing changes of basilar part of vitreum and vicinal tissues.It was helpful to select way and time to reoperation to the patients of ocular hypotension after silicone oil tamponade and aPVR.