Clinigen Group plc (AIM: CLIN, 'Clinigen'), the global pharmaceutical Products and Services company, announces it has signed an exclusive agreement to partner with Eyevance Pharmaceuticals, a wholly-owned subsidiary of Santen Pharmaceutical Co., LTD, to manage the supply and distribution of NATACYN® (natamycin ophthalmic suspension) 5%, an ocular antifungal drug for topical administration.