The Glogau classification system was developed to objectively measure the severity of wrinkles and photo-aging (the premature aging of the skin, which is usually caused by too much exposure to ultraviolet rays). This classification system helps practitioners pick the most appropriate procedures or skincare product for professional treatment.
Glogau 1: No Wrinkles, early photo-aging
Glogau 2: Wrinkles in motion, early to moderate photo-aging
Glogau 3: Wrinkles at rest, advanced photo-aging
Glogau 4: Only wrinkles, severe photo-aging.