Laser is not used for Haemorrhoid surgery

A YAG laser surgery is a surgery for cataracts. Cataracts are what makes a persons vision blurry or cloudy. The laser surgery makes it so that person can see better after they have the surgery.

Laser surgery is surgery using a laser (as an alternative of a scalpel) to cut tissue. Examples include the use of a laser blade in otherwise conventional surgery, and soft tissue laser surgery, where the laser beam vaporizes soft tissue with high water content. Laser resurfacing is a technique in which molecular bonds of a material are dissolved by a laser. The process offers a lot of beauty treatments nowadays

watch "how its made laser eye surgery" on youtube.com

It all depends what you are getting laser surgery for. For laser eye surgery and laser therapy to help you quit smoking, you will be awake. Laser teeth whitening procedures are also done while you're awake.