For eighty years, Barren Island rendered New York's dead horses into glue. The shoreline later became a landfill that now erodes into the tide, releasing old bottles alongside fragments of horse bone. Justin Ginsberg and Anna Riley collected broken twentieth-century glass from the surf and ground optical lenses into it, returning discarded fragments to glass's oldest role as an instrument of sight. A lens vanishes into what it shows; these hold their history in view. Pressed to the eye, each directs attention toward the object, through it, and back onto attending itself. The pair used the lenses in a presentation on attention, community, and curriculum, and later developed a three-channel video of viewers squinting toward focus.