The crow's feet are dynamic wrinkles, which are highlighted with the movement of mimic muscles, those that allow changes in facial expression. The cosmetic capable of erasing not only does not exist but it is also difficult to be developed, precisely because they are highlighted intermittently: if the face is relaxed they are absent, but at the slightest smile or change of expression here they appear. Moreover, they are not all the same and aesthetic medicine proposes different solutions to mitigate them.

Contrary to what we think, the blepharoplasty can not erase them: "To make them invisible, the doctor should over-stretch the skin, a situation that would prevent any movement to the eyelids. The wrinkles around the eyes are due to the action of the orbicularis, that is, the contracting one closes the eyes. This muscle has a more peripheral part that does not have the function of closing the eyelids, but only to lower the side part of the eyebrow, explains Carlo Gasperoni, professor at the Master of Aesthetic Surgery of the Face at the University Tor Vergata in Rome. "These wrinkles are treated with botulinum toxin injections that work by relaxing or stopping the muscle, which therefore no longer causes the wrinkle. The lateral part of the eyebrow, lacking the muscle tone of the lateral muscle part, goes back a little. Therefore these injections are made of botulinum toxin with the dual purpose of eliminating them by raising the tail of the eyebrow. When wrinkles are not only lateral, but are also present under the eyes, this treatment with botulinum toxin is not possible because otherwise the eyes would not close more correctly. In these cases, if there is also some skin abundance, the plastic surgeon can act with a blepharoplasty intervention by redistributing the skin".

For those looking for a soft solution, injections of natural hyaluronic acid can be an effective and minimally invasive solution to counteract this type of expression wrinkles: "Free of additive chemicals and adhesives, it is a powerful regenerant that stimulates both the production of collagen, which give tone and compactness to the skin, both the microcirculation, which is generally quite fragile in the eye contour area, "explains Antonino Di Pietro, professor and director of the Vita Cutis Milano Dermoclinico Institute. "With the overlap technique, the doctor injects very small amounts of this substance, allowing the needle to penetrate the surface several times, lifting the skin folds and releasing the active agent".