A systematic review of eleven studies and 585 patients analyses changes in eyebrow shape with botulinum toxin. It describes a repositioning effect that varies according to the muscles and points treated. This approach concerns the muscular balance of the brow; it does not transform the bony structure of the orbit or the anatomical shape of the eye.
A randomised trial studied the influence of different botulinum toxin injection patterns on forehead lines and eyebrow height. It shows that the distribution of injection points plays a role in the result achieved. The study supports precise anatomical planning to reduce wrinkles while considering eyebrow position.
A review of male facial anatomy describes a generally more angular jaw, proportions that differ from those of the female face and often more developed muscles. These characteristics guide the choice of treatment areas, quantities of product to inject and techniques to use. Treatment should be tailored to each patient to correct the features that concern him while preserving his characteristics.






