Low Level Laser Versus Polarized Light in the Treatment of Acne Vulgaris

Excimer laser patients undergo ultraviolet b phototherapy treatments at a physical medicine clinic twice a week for four weeks. The device uses a 308nm beam of coherent light, with six spot sizes to avoid healthy skin. The radiation exposure time is 10 minutes, with a maximum dose of 0.65 J/cm². Personal protection standards include wearing protective eyewear for the retina and choroid, as they absorb visible light radiation, which can cause keratoconjunctivitis or cataracts. The thermal effect of the laser can cause superficial carbonization of the epidermis, phlyctens, or erythema, so non-flammable gloves are recommended.

Patients undergone Bioptron light treatment twice weekly for four weeks at a physical medicine clinic. The treatment is administered by a physiatrist following the manufacturer's user guide. Patients sit in a comfortable chair with their hand on an armrest, holding the Bioptron light probe at a 90° angle for 10 minutes.