key hole surgery is where the hole is no bigger than a cm, maybe smaller. they insert a camera inside and operate through the small incision using the camera as oppose to cutting you open to look inside. hope this helps.
Ive had 3 keyhole ops, the most visible scar in my belly button, its about 2cms. Also have one a bit further down, by bikiniline – cant see it at all! Also have 2 on either side of my right knee, again not visible, so nothing to worry about at all x