Dog walker Megan Novak, 32, and German Shepard, Border Collie and flat coated retriever mix, Cocoa who must wear sunglasses on her walks, to protect her eyes from UV light, pose together in the woods in Worthing, West Sussex . See SWNS story SWSYgoggles. Meet the dog who rocks stylish shades on every walk - to protect her from sun exposure that can worsen her rare eye disease. Cocoa, a mix between a Belgian Shepherd and a collie, has to wear the special goggles to save her from harmful rays. The fashionable eyewear - called Rex Specs - are specifically designed to protect dogs' eyes from up to 95 per cent of UV. Owner Megan Novak, 32, spent £100 on the goggles and spare lenses after advice from a vet.