outcomes of retinal re-surgeries in silicone oil filled eyes

Conditions: Retinal Detachment; Proliferative Vitreo-Retinopathy; Proliferative Diabetic Retinopathy

Summary: anatomical and visual outcomes of retinal re-surgeries done in silicone oil filled eyes

* basic demographic profile including name, age, gender, place of residence will be documented. * structured questionnaire will be used to collect information regarding systemic diseases including diabetes mellitus and its duration, hypertension, dyslipidemia , any cardiovascular diseases, any history of ocular trauma or any other ocular comorbidities. * details of the primary retinal surgery including indication, date of surgery, name of the procedure will be noted * details of re surgery including indication (retinal pathology), timing of the re surgery from the primary surgery, preoperative best corrected visual acuity(bcva) a using log mar (minimum angle of resolution)) chart at 3 meters, intra ocular pressure using non contact reichert 7 tonometry will be noted. * slit lamp bio-microscopy of the anterior segment using topcon slit lamp biomicroscope,90 diopter lens examination and indirect ophthalmoscopy with 20 diopter lens of the fundus will be done. * spectral domain oct(optical coherence tomography) with zeiss cirrus hd oct (high definition- optical coherence tomography) machine will be done for documentation of the status of macula in whichever cases possible. * re surgery will be done by a single senior consultant in all the cases. alcon luxor biomicroscope with non contact biom (binocular indirect ophthalmomicroscope ) viewing system will be used. 2 ports will be made. top up of silicone oil will be done whenever needed. membrane peeling with relaxing retinectomy / drainage retinotomy , haemostasis and endolaser will be done under silicone oil as required. after the re surgery, the patient will be advised to maintain prone position. * after the re surgery the bcva(best corrected visual acuity), iop (intraocular pressure) will be noted on first visit at 15 days, 3rd month and 6th month follow up. * fundus examination will be done at all visits. spectral domain oct(optical coherence tomography) will be done at all visits to see the status of macula. statistical analysis * data entry will be done in microsoft excel and analysed using the latest spss (statistical package for the social sciences) software. * wherever required, descriptive analysis will be done * chi square test will be used to find the statistical significance among the qualitative data, •two-tail t test will be used to find statistical significance among the quantitative data pre and post operatively. * other statistical tests will be used depending upon the need for post hoc analysis.

Eligibility criteria:
inclusion criteria: * patients who had under gone the primary retina surgery at ahalia foundation eye hospital / elsewhere for retinal detachment secondary to various retinal pathologies and underwent re surgery during their follow up at ahalia foundation eye hospital during the study period. * patients whose proper follow up to 6 months after re surgery were maintained during the study period. * no history of any additional eye disease other than h/o cataract surgery or primary rd repair. * patients who were willing to be a part of the study and willing to provide informed written consent. exclusion criteria: * patients who did not come for any of the follow up included in the study. * patients who had history of ocular trauma after the primary surgery. * patients who have any other ocular comorbidities other than cataract. * patients who had undergone multiple previous re surgeries for retinal detachment.

Keywords: retinal re-detachment in silicone filled eyes under silicone oil proliferative vitreoretinopathy