Patient: Patient, female, 69 years old, in August 2011, her left eye vision decreased significantly to only 0.1, and she was diagnosed as having retinal detachment in her left eye at the hospital, and the doctor suggested surgery at that time, but the patient was reluctant to have the surgery because she was worried. Later, because he felt frequent discomfort in his left eye, his vision was severely reduced and he could only have some light perception in his left eye, he underwent surgery at a local hospital on January 13, 2012 only after repeated advice from his family. On January 13, 2012, the biosurgery was done in the local hospital, and the post-operative retest was normal. The vision of the left eye gradually recovered some of the vision, and now there is 0.2, and the intraocular pressure is normal. The doctor suggested to remove the silicone oil in 3-6 months. Because of the patient’s age, nearly 70 years old, afraid of surgery, do not want to operate again, and now the left eye is normal, there is no discomfort, but also worried about taking out the silicone oil retina detachment again. I don’t know what harm silicone oil can do in the eye, please ask the experts to elaborate. 1.Is it necessary to take out the silicone oil injected by surgery? 2.If the silicone oil is not removed, what harm will there be if it is in the eye for a long time? 3.If the silicone oil is not taken out now, what kind of regular checkups should be done? Li Qiuming, Ophthalmology Center, Zhengzhou University First Affiliated Hospital