170o Double-DomeTM View - See objects at their true size and distance - Know exactly where you are in your environment - See approximately 5X more than traditional flat masks Magic Bifocal Effect - Corrects for Bi-Focal presciptions & Reading prescriptions up to +2.00 diopters No Contact Lens Required for: - 50% of 20/20 Divers in their mid-20's - 85% of mildly myopic Divers