Liberty Sport Protective Glasses RS-40 Eyeglasses are design to protect your kid’s eyes while playing sports. Did you know that 90% of eye injuries are avoidable with the appropriate protective eyewear? Most frequent sports that can cause eye injuries are Basketball, Baseball, Football and Soccer. Rec Specs RS-40 Matte Grey/Cyan #322 meets or exceeds ASTM F803 impact resistance standards for various sports. It allows for a wide range of prescription lens powers.