Underlash Placement Geometry: Maintaining the 1–2mm Meibomian Waterline Safety Gap for Naturally Upturned Outer Corners
Mastering Underlash Placement Geometry: Maintaining the 1–2mm Meibomian Waterline Safety Gap for Naturally Upturned Outer Corners requires establishing a strict 1.0mm to 1.5mm safety clearance from the wet eyelid waterline, anchoring featherweight cluster segments directly to the underside of natural lash roots.
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