This deluxe dual-ended precision pencil with companion brush shapes, shades and defines brows for a beautifully natural look. The velvety smooth formula glides on effortlessly for gorgeously groomed brows. Ophthalmologically tested. Suitable for sensitive eyes and contact lens wearers. YSL Dessin Des Sourcils Eyebrow Pencil. Two functions brought together in a single tool for a more than perfect line: a precision pencil for redefining the curve of the brows and a spiral brush for grooming. Ophthalmologically tested. Suitable for sensitive eyes and contact lens wearers.