The goal of this clinical trial is to learn the efficacy and safety of fractional 1064-nm picosecond laser for facial skin tightening. The main questions it aims to answer are: * Efficacy of fractional 1064-nm picosecond laser for facial skin efficacy including the changes in wrinkle, nasolabial fold, skin laxity, and skin elasticity * The changes in texture and pore volume using Antera * The changes in bioengineering assessment: melanin index, erythema index, sebum level * Adverse events Participants will be treated with 3 sessions of fractional 1064-nm picosecond laser (full face 4 passes, vector lines 4 passes), spaced 4 weeks apart. Follow-up visits 1, 3, and 6 months after the last treatments.
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The changes in wrinkle.
Timeframe: 4 weeks after the first treatment, 4 weeks after the second treatment, during 1, 3, and 6 months after the last treatment.
The changes in nasolabial fold.
Timeframe: 4 weeks after the first treatment, 4 weeks after the second treatment, during 1, 3, and 6 months after the last treatment.
The changes in skin laxity.
Timeframe: 4 weeks after the first treatment, 4 weeks after the second treatment, during 1, 3, and 6 months after the last treatment.
The changes in skin elasticity.
Timeframe: 4 weeks after the first treatment, 4 weeks after the second treatment, during 1, 3, and 6 months after the last treatment.