Research on the Evolution, Geometry, and Alterations of the Periorbital Region Based on Age and Deformations

"For each subject, the displacement of markers, the deformation of regions between markers, and the evolution of angles formed by the markers during facial expressions and vertical movements will be analyzed with MoCap. These will be compared between the two age groups (18-33 years vs. 50-65 years) using a MANOVA model. The reference values for marker displacement will be defined by the interval between the 2.5% and 97.5% percentiles of the values for each marker. If the distribution is Gaussian, the percentiles will be derived from the standard normal distribution; otherwise, the non-parametric method will be used.~The intervention will be Interventions :~* Recruitment of healthy and pathological subjects.~* Full-face and macro images of the periorbital region~* Measurement of periorbital skin properties using MoCap and standard reference tools.~* Application of a tightening product (aloe vera) and periorbital massage.~* Measurement of skin response to a vertical jump."