Fifty-three people with mild to moderate acne scars had three monthly Fraxel treatments with the 1550 nm laser. Nearly 90% saw their scars improve by about half to three-quarters. Results improved with each session. Side effects were mild and short — redness and swelling — with no lasting dark spots or scarring across skin types I to V. There was no control group, so this is lower-level evidence, but it supports Fraxel for acne scars.