After the removal of silicone oil, vision usually improves in general, and the exact prognosis of vision is related to the patient’s condition. After vitrectomy, silicone oil is injected into the eye to fill it. Whether or not vision improves after removal of the silicone oil depends on preoperative visual acuity, postoperative intraocular pressure, and refractive status. Silicone oil is transparent, but has a different refractive index than vitreous, which can cause hyperopia and loss of vision, so the patient’s vision usually improves when the oil is removed. If too much silicone oil is injected into the eye causing an increase in intraocular pressure, glaucoma may occur secondary to the injection, resulting in blurred vision. After the removal of the silicone oil, the intraocular pressure is lowered, and to some extent, the vision can be improved. If the silicone oil has been in the eye for too long, emulsification occurs and becomes cloudy, making the refractive medium unclear and vision blurred, after removing the silicone oil, vision becomes clear and the patient’s vision will be relatively improved. When the refractive error is large or the vitreous and retinal lesions are severe, the patient’s vision will not be greatly improved after the removal of silicone oil. It is recommended that after silicone oil filling surgery, patients follow the doctor’s instructions for care, have regular checkups, and seek medical attention when discomfort occurs.