About the zig-zag vs the straight line, seems to me that it would depend on where the incision is done. My son's ENT did the incision in a crease in his neck so that it would not be noticeable and it does not show at all (just as fishmanpa mentioned). However, I can see that if a straight line is done on the chin and on down in a straight line, it would seem that the eye would follow the line on down as far as it goes. But if the incision starts on the chin and then goes off to one side, the eye which was following the straight line has no straight line to follow. On the chin there are not usually creases in which to hide a scar like there is on the neck. Just my two cents.