How should I use this mask correctly on the neck and eyelid area?

As this is a full-coverage sheet mask designed for the face, neck, and eyelids, start by aligning the main facial cutouts with your eyes, nose, and mouth. Gently smooth the fabric from the center of your face outwards. For the neck portion, carefully unfold and press it against your skin from the jawline down. For the eyelid area, which is particularly thin and reactive, apply the corresponding flap with extra care, avoiding direct pressure on the eyeball. Leave the mask on for the time specified on its packaging, typically 15-20 minutes, then remove. Gently pat any remaining serum into your skin. The product cautions that if your skin is very sensitive or the eye area is particularly reactive, you should test on a small area first and use extra caution during application. Avoid applying to any irritated or damaged skin.