The laser is simply one tool used to achieve certain results. In broad terms, there are two types of lasers, ablative and nonablative.
Nonablative lasers are used to treat broken blood vessels, brown spots and hair removal. Generally, they are done by persons who are supposed to be ultimately supervised by physicians. Results from well qualified allied health care professionals for these lasers generally are consistent through most practices since they are considered safer with less side effects as long as they are used acording to manufacturer guidelines and for the right skin types.
Ablative lasers on the other hand like the erbium or CO2 laser, require the use of skilled surgeons who have had additional training with them since these lasers also have the potential for more harm. I would recommend going to a physician who owns their own laser since that means they use it more often and are likely more skilled with its nuances. Also, I would check to see their credentials with organizations like the AAFPRS, ASPS or ASLM to name a few.
