To place the Oakley Splice goggle inside the case, with the goggle case open, place the Splice goggle upright with the strap tucked in behind the lens, lens facing down, into the top lid of the case. The case lid is the part with the Oakley logo on it.
Replacement goggle lenses are in the Sports Shades Online Oakley Snow Goggle accessory lens section. Check out the related products on this page for Oakley snow goggles.