TYR Corrective Optical Goggles Train hard, train smart with the Corrective Optical Goggle. Featuring wide angle, optical grade, polycarbonate lenses in corrective diopters (-2.0 through -8.0), the LGOPT provides crystal clear vision and is an excellent alternative to contacts. The universal eye socket frame design ensures a perfect, fuss-free fit for all swimmers. The TYR corrective prescription swimming goggle is equipped with Thermal Plastic Rubber gaskets for leak-proof protection, as well as a durable, split, TPR headstrap, for a secure fit. Easy adjust snap-lock side clips make sizing a cinch. Know no boundaries with these sight enhancing goggles that are perfect for training and recreation. All polycarbonate lenses include full UVA/UVB protection.