Wrinkles

Eye Wrinkles:
Eye wrinkles and lines (also called crow´s feet) have different causes, mainly:

Aging
Sun damage
Eye muscle movement
Surgery
Scars
Gravity
Smoking
Pimples

Eye wrinkles and lines appear because the dermis (the lower layer of skin) starts getting thick irregularly, and also because the amount of water in the epidermis (top layer of the skin) starts decreasing due to damage by the sun [...]