Zenni Optical is an online retailer that specializes in affordable eyewear, including prescription glasses and sunglasses. Founded in 2003, the company aims to provide high-quality eyewear at lower prices by selling directly to consumers without the traditional retail markup. Customers can customize their glasses by choosing from various styles, colors, and lens options. Zenni Optical also offers a virtual try-on feature, allowing users to see how different frames look on their faces before making a purchase. This innovative approach has made eyewear more accessible to a wider audience.