Opti Crystal by COSMEDIX is the holy grail for under-eye rejuvenation. Unlike heavy creams, this serum uses a Liquid Crystal delivery system to plumping fine lines and neutralize environmental stress (like blue light) with Spin Trap antioxidants. It’s a 7ml concentrated shot of hydration that layers perfectly under makeup. Trusted by estheticians globally to treat dark circles and dehydration without irritation.