The YES Seal of approval maintains the highest quality assurance in all approved practices. Each practice abides by the following protocols: Unconditional Warranty Patient Advocate / Arbitrator Licensed / ABO Opticians on Site Guaranteed Fit Policy for Progressives All Products Delivered With Certificate of Autheticity Specialty Trained Staff Direct From the Manufacturers Adherence to Strict Manufacturing Guidelines for Producing Custom Opthalmic Lenses Satisfaction Guarantee 30 Day Exchange Policy (not including insurance & union plans) Annual Review and Recertification for Delivering Quality Products & Maintaining Best Practices for Quality Assurance