There are 3 main types of anaesthesia: Topical anaesthesia with drops, generally you can see within a few minutes after the operation and little or no redness. Local (subtenons) anaesthesia, no discomfort or sight loss during the operation, but need to wear a pad over the eye for at least 4 hours. General anaesthesia, where you are fully asleep for the operation, but you need to be healthy and require a pre assessment visit too. These options will be discussed at your consultation.