Dark circles gone, hollows filled, a "refreshed" look in one visit — most clinic pages promise the same thing. What they rarely explain is why the under-eye area is so hard to treat well, and why a growing number of patients in Seoul are choosing an ECM booster called Re2O Fine over standard hyaluronic acid filler. At Forena Clinic, located in Seoul's Hongdae district, this is one of the most common concerns we treat — with consultations available in English, Chinese, Japanes