Ray-Ban RB4171 Erika Sunglasses 710/T5 Size: 54mm Polarized Lens Ray-Ban RB4171 710/T5 54mm. Timeless style, authenticity and freedom of expression are the core values of Ray-Ban, a leader in sun and prescription eyewear for generations. Since the introduction of the iconic Aviator model created for the aviators of the United States Army, Ray-Ban has been at the forefront of cultural change, becoming a symbol of self-expression, worn by visionaries all around the world.