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Dr. Charles Mok explains the Fraxel Dual laser's two wavelengths. The 1550 nm laser reaches deeper collagen while 1927 nm treats the surface epidermis. Skin thickness varies by location: under-eye is 300-600 micrometers, the nose tip around 1100.
Questions this video answers
1550 nm and 1927 nm.
1550 nm primarily targets deeper collagen.
1927 nm targets the superficial epidermis.
Around 2010–2011.
About 1000 microns (≈1 mm).










