2.9. Skin Wrinkles
DMD
LENS
We took high-resolution photos through a Mark-Vu (PSIPLUS, Suwon-si, Republic of Korea) 18-megapixel lens. PRIMOSCR (GFM, Teltow, Germany), a three-dimensional wrinkle measuring device using Digital Micro Mirror Device (DMD) technology, measured crow’s feet using parameter values of Ra (arithmetic average of profile peak height within the total measurement length), Rmax (maximum peak-to-valley value Rt over the assessment length), and Rz (average maximum height of the profile). 