2.1.5. Blinding procedures.
BLIND
The study will be carried out by a research team that will include a researcher who will carry out the application, undergraduate students, and 3 plastic surgeons who will carry out the initial evaluation of the photographs and the reevaluations after the application of the treatment (blind as to the composition of the groups), and a statistician for data processing.The researcher responsible for the PBM application will pick and open the envelope containing the information of the experimental group in which the participant will be inserted and will proceed with the experiment. A single researcher will carry out the treatment and it will not carry out any type of evaluation. Pre and post-treatment assessments will be made by 3 examiners (3 plastic surgeons) who will not be aware of the group to which each patient will be allocated. Participants will not be aware of whether or not they have received the application of the PBM, as they will be using dark goggles. The person responsible for the application will position the equipment in the irradiation locations in all participants and will only activate the light when provided for in the specific experimental group. In the control group, the mask will be installed and kept off and a white light will be turned on close to the participant’s face so that they have a sensation of luminosity even using the blindfold. The characteristic sound of the device will be triggered by recording in the placebo group for the PBM.