Retinitis pigmentosa (RP) is a group of inherited eye disorders that affect the retina. It causes a gradual loss of vision over time, typically starting with night blindness and tunnel vision.
This game is designed to emphasize this difficulty of RP. As oppose to people with normal vision which might find this empty version of the game quite easy, people with RP, who have a limited field of vision, will find it much harder to find Waldo, hence the name of the game.