For those of you who wonder what an Eye Lighter is, it's a 6" long transparent plastic bookmark. It's designed to underline the sentence a child is reading, while not masking the lines below. The ability to track more than one line at a time is important in developing fluency.
They come in four colors, Yellow, Green, Blue and Pink. If readers experiment with each, they may find their eyes prefer one color over the others, helping to maintain reading focus and improve stamina. Order your own here.