Vintage Chanel White Prescription Sunglasses

This pair of vintage Chanel sunglasses are white, with gold “C” hinges on the side. They are in overall good condition. There are some marks on the outer arms as seen in photos. The inner arm on one side (by the ear) has a blue stain that can’t be seen when worn. The lenses are in excellent shape. They are dark, and have a trifocals prescription. I do not know what the prescription strengths are.