Eyelashes grow to a length based on each individual; the lashes fall out and are replaced with new ones in cyclical patterns just like the hair on your head. Eyelash extensions, whether temporary or semi-permanent, will enhance the natural lash line, as thy add thickness and length to an individual's natural lashes,.
Permanent makeup is not actually permanent - but it will stay in place for many years, so having it applied is not a decision that should be taken lightly. As you can see in the video below, having permanent makeup applied can greatly improve your looks, but if you do not like the results, you are somewhat up a stream without a paddle.