Wrinkles and Fines Lines
Wrinkles are both active and passive lines. Active lines appear only when contracting the facial muscles, whereas passive lines can be seen at rest.
Static lines and wrinkles appear because of the repeated use of facial muscles (79).
The aging process leads to a slow down of collagen and elastin production in the skin so that as we get older, the areas of over-use become damaged and the lines become permanent, persisting at rest.
A face with no passive lines and minimal active lines would be deemed more attractive and youthful, independently of the culture. Again, as the number and depth of the wrinkles increase, as the perception of age of the person also, wrinkles being associated with old age.