OPTUS Pharmaceutical Co., Ltd. is a South Korea-based pharmaceutical company primarily engaged in the research, development, manufacture, and commercialization of ophthalmic therapeutics, consumer eye care products, and contract manufacturing services. Founded in 2002 and headquartered in Cheongju-si, South Korea, the company operates as a key consolidated subsidiary of Samchundang Pharm Co., Ltd. OPTUS Pharmaceutical specializes in preservative-free, single-dose (unit-dose) and multi-dose ophthalmic solutions across prescription (ETC) and over-the-counter (OTC) segments. Its core pharmaceutical portfolio encompasses dry eye syndrome therapies such as Tearin F (sodium hyaluronate), Dry Free (cyclosporine), and Diqua Free (diquafosol tetrasodium); anti-infective and antibacterial solutions such as Ophthaloxin (moxifloxacin); anti-allergic and anti-inflammatory eye drops; treatments for glaucoma, steroids, and retinal disorders; and artificial tear formulations such as Dr.Fresh F (carboxymethylcellulose). Under its consumer total eye care umbrella brand OUE& (Open Ur Eyes), the company distributes OTC ophthalmic drops via its OUESOO brand, including Piaren; vision-focused functional dietary supplements via its OUEFIT brand; and ocular-area cosmeceuticals and blue-light protection skincare via its OUELAB brand. In addition, OPTUS Pharmaceutical provides contract manufacturing organization (CMO) and contract development and manufacturing organization (CDMO) services to domestic and international pharmaceutical partners, utilizing advanced aseptic blow-fill-seal (BFS) production technology. In recent operational developments, the company rebranded from DHP Korea Co., Ltd. to OPTUS Pharmaceutical Co., Ltd. to support its global expansion strategy. To scale its manufacturing footprint to cGMP standards, the company executed an investment of approximately KRW 86 billion to construct its advanced Osong Plant 2 facility, integrating automated quality and electronic management systems. Furthermore, OPTUS Pharmaceutical expanded its therapeutic pipeline by securing exclusive South Korean licensing and distribution rights from US-based Orasis Pharmaceuticals for QLOSI (pilocarpine hydrochloride ophthalmic solution 0.4%), a novel preservative-free eye drop for the treatment of presbyopia.