Silicone oil can be kept in the eye for 1~2 years, and it is usually taken out about 3~6 months after vitrectomy and silicone oil injection to avoid secondary damage, and the time of retention can be prolonged under special circumstances, but regular follow-up examinations are required. Intraocular silicone oil injection is generally used after vitrectomy to press against the retina and temporarily replace the vitreous function. After vitrectomy and silicone oil injection for retinal vitreous diseases, the silicone oil should be removed according to the recovery of the retina, usually about 3~6 months after the operation, and the time can be extended depending on the recovery situation, but regular follow-up examinations are required. Silicone oil will emulsify if it stays in the eye for a long time, and emulsification will lead to complications, such as secondary glaucoma and secondary cataract, so it needs to be removed in time. In case of severe eye trauma or refractory retinal detachment, the silicone oil should be removed and replaced with new silicone oil regularly. After the intraocular silicone oil injection, you need to have regular checkups and have your eye treated according to the doctor’s recommendation and the condition of your eye.