Swarovski prescription glasses NWT FRAME FEATURES: SK2021 eyeglass frames feature a square, transparent frame finished with full cut crystal hinges. PRESCRIPTION READY EYEGLASS FRAMES: Swarovski eyeglass frames feature lenses that need to be replaced with prescription lenses so you can enjoy clear vision. CASE & CLEANING CLOTH INCLUDED: Each pair of Swarovski sunglasses comes with a cleaning cloth and case to store and protect your sunglasses from scratches and damage.