What technique do you use?

That’s a good question to ask, but however it’s answered is not nearly as important as the end results that you’re able to see from a technician’s before and after photos.
I’ve had clients come in after having work done elsewhere where the technician said they were doing hairstrokes and the end result didn’t look that way at all. Have you noticed that hairstrokes also look different from different technicians’ work?
I’m afraid that any technique – no matter what it’s called – will be subject the skill level of the individual technician. The best way to discern that is by looking at a wide range of photos to see if the technician is producing the kind of work that you’d like to see done on yourself.
Aside from that, the best way I would describe my approach to eyebrow tattooing is to make them look as realistic as possible, and the most realistic looking eyebrows look like they have real hairs.