Forehead Prep (IMAGE) University of Pennsylvania School of Medicine Caption This is a subject prepared for imaging. White foundation and black speckle makeup are applied to each patient. The speckles are then tracked by the digital camera, and their displacement is measured to determine wrinkle reduction. Credit Penn Medicine Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.