Is it possible to Co2 laser on only part of your face?

Yes, CO2 laser is wonderful for treating acne scars and it is possible to treat certain areas. I offer CO2 laser resurfacing for cheeks, perioral (around the mouth), periocular (around the eyes), forehead and nose- those are the areas I divide the face into. I routinely perform full face CO2 laser resurfacing, however, I also routinely perform CO2 laser resurfacing around the eyes, mouth and cheeks as individual areas. Results are fantastic and there is no 'unevenness' noted when performed correctly. 

CO2 laser resurfacing is the best method to improve acne scarring!  Although you can have it done on limited areas of the face, I would not recommend it for your issue.  CO2 laser can cause a bit of permanent lightening of the skin color, which is not a problem if the treatment is performed on the entire face and blended well along the jawline so that there is no line noticeable where the laser began and ended.  Having CO2 laser only on the cheeks makes this blending impossible unless you naturally have very light, ivory skin.  The only isolated areas of the face that are lasered separately are the lower eyelids (to eradicate the crepey skin) and, less commonly due to the color blending issue, the area around the mouth (to improve the lines around the lips).  My strong recommendation is to find a board certified plastic surgeon who has experience using CO2 laser for your best result.  Best wishes to you!     

Yes, absolutely we do treat scars and smaller areas of concern with CO2 laser.  However, in the hands of an expert practitioner the edges are blended to minimise any demarcation.  Best wishes, Shobhan.