The existing method for making double eyelid is to fix the lid with thread. Such an unnatural crease looks too heavy and is easy to untied as it only depends on thread. Natural adhesion is a surgical procedure to induce adhesion of natural double eyelid along the crease, which makes natural double eyelid line that is not easily untied.
Ruby Plastic Surgery makes beautiful and natural eyes based on our know-how accumulated though many surgery cases.