Phyto-Khol Star Waterproof Soon, a grooved rod was patented. This device picked up the same amount of mascara for each use. Then the grooved rod was altered to the brush similar to the ones used today. The change in applicator led mascara to be even easier to use, and its popularity increased. WHAT IT IS: A creamy, waterproof eyeliner pencil built for seamless application on both the lash line and waterline. If yoursquo;re hoping to achieve bigger-looking eyes and fuller lashes, look no further than the best waterline eyeliners. But bear check it out in mind that eyeliner in the waterline can cause dryness for some. "It occludes the openings of the meibomian glands,rdquo; says board-certified ophthalmologist, Dr. Diane Hilal-Campo. ldquo;This prevents the oils from being released into the tear film. This will cause the patients' eyes to be dry.rdquo;