Original sentence: He has published a study which claims to find that people of either sex who are considered "attractive" in various cultures have facial features which fit the mask.Plastic surgeon Stephen Marquardt has developed a highly symmetric beauty mask marked with various outlines of facial features based on the golden ratio (1:1.618)
Edited sentence: People of either sex who are considered "attractive" in various cultures have been found to have facial symmetry based on the golden ratio of 1:1.618.Plastic surgeon Stephen Marquardt developed an ideal beauty mask marked with various outlines of facial features based on the golden ratio.The faces that are judged as most attractive are found to fit the mask