Can you tighten under eye skin? Photoaging first manifests in the eyes. When the sun protection work is not in place, facing the same intensity of photoaging, the skin of the eye is the most prone to degeneration of collagen in the dermis, and the accumulation of elastic fibers, which in turn forms eye wrinkles. As we age, around the age of 20, the number of collagen-producing fibroblasts in the human body begins to decrease. From the age of 25, both the number of fibroblasts and the production of collagen have decreased, and the components of collagen are among them. Also becoming less and less "young". Therefore, 25-30 years old is the initial consideration of anti-aging age. Adult dermis contains type I, type, and type IV collagen, of which type I collagen accounts for the majority, followed by type I collagen. In human aging, the reduction of type collagen, the increase of type collagen ratio, and the relativel…