There are several options when it comes to purchasing a second pair of glasses, including big chains and online retailers. Here are a few options to consider:

1. Warby Parker: This online retailer offers stylish, affordable eyewear with a range of options for prescription glasses, including progressive lenses and blue light blocking lenses.
2. LensCrafters: This well-known chain offers a wide selection of frames and lenses, as well as in-store services like eye exams and lens fitting. They also have a virtual try-on feature on their website.
3. Zenni Optical: This online retailer is known for its low prices and wide selection of frames. They offer a range of lens options and coatings, including progressive lenses and anti-reflective coatings.
4. Costco Optical: Costco members can take advantage of their optical department for affordable glasses and contacts. They offer a range of frames and lens options, as well as in-store services like eye exams and fittings.
5. GlassesUSA: This online retailer offers a wide selection of frames and lenses, with options for prescription glasses, sunglasses, and blue light blocking glasses. They also offer a virtual try-on feature on their website.