A99 Golf E-1 Ball Finder Glasses (Black Frame) Designed for finding lost golf balls. UV protection, Flexiable and comfortable. Model: E-1, Color: Black Frame A99 Golf Eagle Eye golf ball finder glasses are ideal for retriving the lost golf ball in long grass. By Filtering out unwanted sunlight, bright objects such as white or yellow golf balls stand out in your vision, thus make locating them much easier. The Eagle Eye golf ball finder glasses make your game more enjoyable by reducing the time spent on searching lost balls. This glassfinder works very well if there is green grass, while if there is yellow or light color leavels fall down every where, it won't change the enviroment a lot then make it a big difference comparing with white golf ball. The golf ball finder glasses only works when part of the ball can be seen through the gap of grass leaves, if the ball was blocked throughly by the rough grasses, please be noted the finder won't work like an ultrasonic machine - it won't help you see through the grass leaves.