Lens resection is usually done without silicone oil. Lens removal is typically used to treat conditions such as cataracts. There are a variety of surgical procedures that can be performed to remove the lens, such as having a cataract aspirated by ultrasonic emulsification or having a small incision extracapsular cataract removed. Silicone oil does not need to be injected into the eye after the surgery, but an IOL is usually implanted to compensate for the refractive defects after the surgery and to give the patient better vision. If patients undergo vitrectomy, silicone oil may need to be injected into the eye, which is mostly used for retinal detachment, etc. Silicone oil top pressure is needed to promote retinal reset. It is recommended that patients go to the ophthalmology department of regular hospitals for consultation, so that the doctors can formulate a reasonable treatment plan.