What Is Rejuran I (Eye)? Rejuran I (Eye), also known as Rejuran Eye, is a specialized injectable skin booster designed specifically for the delicate skin around the eyes. Unlike standard Rejuran Healer used on the full face, Rejuran I (Eye) uses a salmon-derived PN (Polynucleotide) formulation with a lower concentration and finer consistency, making it safe and suitable for the thin, sensitive tissue of the under-eye area. The treatment works by delivering PN directly into th