Comparative Study 23G Versus 27G Vitrectomy

Inclusion Criteria: * Patients aged over 18 * No prior vitrectomy surgery in the study eye * No prior inclusion in this trial * Scheduled for vitrectomy for floater removal or macular surgery Exclusion Criteria: * Patients with serious heart, lung, liver, or kidney dysfunction * Patients with proliferative diabetic retinopathy, endophthalmitis, uveitis and other eye disease that impacts the outcome of vitrectomy surgery Patients with HIV (Human Immune-deficiency Virus) * Patients with history of drug abuse or alcoholism * Patients participating in other drug or medical device clinical trials before screening for this trial * Pregnancy, preparation for pregnancy during clinical trial, or breastfeeding * Belief by the investigator that a patient's condition would hinder the clinical trial, such as a patient prone to mental stress, loss of control of mood, or depression