It really depends on what you want to do. If you start to clip between their eyes, you HAVE to keep it up. OFTEN. The little pokey ends will be forever growing out and poking them in the eyes.
Or... you can get through it ONCE, and let it lay down. Then, whether you keep them in a long coat or a puppy cut, it won't poke them. Both Kodi and Pixel are in puppy cuts, Pixel in a fairly short cut, Kodi in a long puppy cut. I do NOT cut the hair between their eyes or on the bridge of their nose. I let it lay down naturally. I only trim the hair OVER their eyes. That way, as it grows out, there is nothing to poke them in the eyes.
Of course, if you are intending to keep them in show coat, it is important to NEVER cut the hair around their eyes. Then you just have to "suffer through it" until they have enough hair to put up into their first, ridiculous, "unicorn" bow or "devils horns".
The reward is you eventually end up with a girl or boy with a gorgeous adult Havanese coat!
But my main point with ALL of these photos is that in not ONE of them have any of my dogs had any hair trimmed between their eyes or on the tops of their muzzles.