Enjoy the benefits of optical correction in our Certified Safe Full Face Snorkeling Masks. Available for the Vista Vue, Vista Vue II and Vue Tech adult models, this optical frame and lens insert allows you to clearly see the wonders of the ocean in our state of the art masks. The polycabronate lenses for this frame are available in half diopter increments from -1.0 to -4.0. Simply insert the frame into the silicone skirt of the mask, and delight in your snorkeling adventure. Compatible with all adult Deep Blue Gear Full Face Snorkeling Masks plus various other brands including; the Ocean Reef Aria and Head Sea Vue masks. Experience this new option for vision correction while snorkeling from Deep Blue Gear, trusted vision experts since 2005. Curious if this optical frame is compatible with your current Full Face Mask? Learn how to check here, or review the photo showcasing the tabs required for installation in the mask. Full Face Mask sold separately.