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( 8) described the UBM findings of SO emulsification in the anterior segment. UBM can be used to take high-resolution images of the anterior segment and has improved our understanding of many ocular diseases, especially glaucoma. Many methods have been used to detect and evaluate SO emulsification, including ultrasound biomicroscopy (UBM). SO emulsification was proposed as a major reason for this complication ( 3). The incidence of glaucoma following SO tamponade was reported to range from 11 to 56% ( 4, 5), exceeding the frequency in cases without SO tamponade ( 6). However, complications of this procedure have been reported, the most frequent of which are SO emulsification and glaucoma ( 2, 3). in the 1960s ( 1), is now widely used in the management of complicated retinal detachment. Silicone oil (SO), first introduced by Cibis et al. Younger patients and males are more prone to SO emulsification, which may lead to elevated IOP.

Younger age and male (both P 21 mmHg or the use of antiglaucoma medications at the time of SO removal had a higher total SO emulsification grade, were younger, and were more frequently male (all P < 0.05) than patients without ocular hypertension.Ĭonclusions: UBM could play an important role in the diagnosis and grading of SO emulsification. The mean total SO emulsification grade was 19.99 ± 12.98 (range: 1–36). The eight signs were more frequently detected in the superior part of the eye. Emulsified SO particles were found in all 118 eyes (100%). Results: A total of 118 patients (118 eyes) were enrolled in this study. Correlations between SO emulsification grade and clinical factors were determined.

Eight signs of SO emulsification in the UBM images were graded as 1 (present) or 0 (not present) and the grades for all signs in each eye were summed. Ultrasound biomicroscopy (UBM) images of the anterior segment were taken before SO removal. Methods: Patients who underwent primary pars plana vitrectomy with SO injection for RRD followed by SO removal at the Eye and ENT Hospital of Fudan University between January 2016 and January 2020 were included. Purpose: To investigate the characteristics of silicone oil (SO) emulsification after vitrectomy for rhegmatogenous retinal detachment (RRD) and possible correlations with clinical factors.

6Department of Ophthalmology, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China.

5Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, China.

4National Health Commission (NHC) Key Laboratory of Myopia, Fudan University, Shanghai, China.

3Key Laboratory of Visual Impairment and Restoration of Shanghai, Shanghai, China.

2Key Laboratory of Myopia of State Health Ministry, Shanghai, China.

1Department of Ophthalmology and Vision Science, Eye and Ear, Nose and Throat Hospital, Fudan University, Shanghai, China.