Get them ASAP. Get used to using them, and don't look back.
I have quite a bit of experience with loupes having owned two pairs of loupes and two different headlights. I wear them for everything, and I mean everything even perio.
First and foremost get lightweight and comfortable ones. They will all tell you their optics are superior. This is BS. Every major company has good optics; so don't listen to the hype. Just focus on LIGHTWEIGHT & COMFORTABLE.
Also, get the highest mag that comes in a lightweight package. The whole point in loupes is to magnify so don't screw around with lower power mags. Usually this is 3.5x. Don't worry about field of view. If you can see slightly more than one tooth, then the field is wide enough.
I have owned QOptics and Designs for Vision. Do NOT get the "tank" (Buddy Holly or Yeoman) frame from DFV. They were so heavy that I could not wear them for more than a couple of hours. Now they are just an expensive paperweight. I like QOptics. They use plastic rather than metal lens housings which makes the package very light. They have good customer service (I had my frames replaced once with no problems), and they are cheap.
Finally, GET A LIGHT. Don't believe anyone who tells you that you don't need one because they have obviously never used one.
Remember increased mag equals increased need for illumination. Also, there is a fundamental difference between light coming in from the side and light coming from the same direction that your eyes are looking.
Again focus on LIGHTWEIGHT. Don't focus on brightness. They are all bright enough. The brighter ones, like QOptics or DFV are so bright that you will probably turn down the intensity to decrease fatigue.
I have used the QOptics light and the Ultralight (
http://ultralightoptics.com/ formerly loupelights.com). They are both good, but the Ultralight is the lightest one available; so I recommend that.