Based on the information available, Glasses USA appears to be a legitimate online eyewear retailer. It has been in operation for over ten years and offers a wide range of styles and prescriptions for men, women, and kids. The company has been reviewed by numerous customers, with an average rating of 4.3 on Trustpilot and 3.08 stars on Sitejabber. Positive reviews often mention a great selection, easy process, and good customer service. However, some customers have reported issues with shipping, returns, and warranty claims. It's always recommended to do thorough research and read multiple reviews before making a purchase from any online retailer.