CONTACT Bio Optics Co., Ltd. President : Hong Ryul Seo 13201, No.1215, SK V1 Tower, Buiild A, Galmachi-Str 288-14, Jungwon-gu, Seongnam-si, Gyeonggi-do, Republic of Korea Tel: +82-31-747-4850 Fax: +82-31-747-4820 helloeyes@daum.net