Eye Chart & Eye Patch, Brock Beaded String, 10 Foot String with 3 Sliding Beads & Focus Glasses,Eye Convergence Insufficiency - Hand Eye Coordination Training - Better Vision for Athletic Sport 1.Alignment training with the Brock Beading Rope is invaluable for addressing convergence deficits and increasing stamina and athleticism. 2. Featuring a 10-foot extension cord and 3 tight-fitting beads, the Brock Beading Rope is an effective tool for honing visual acuity in specific athletic positions, giving you an unparalleled competitive advantage. 3.The Brock Beading String can be used at home for user convenience and has a short learning curve to ensure quick adaptation，The Brock Beading String features a patented sliding mechanism that allows you to move the ball while practicing with top quality materials. 4.This pair of glasses is suitable for adults or children with myopia, hyperopia and astigmatism. Wearing it for 15 minutes every day and looking into the distance can help relieve fatigue and prevent myopia. 5.Includes 1X focusing glasses for distance reading, 1X eye mask，1X Brock Beaded String，1X Eye Chart