How we measure

Retailers are sorted by one number: the effective per-box checkout total. When you are logged in, that number is adjusted for first-order discounts you have not used yet. Nothing else affects the order. Ever.

We may earn a commission when you buy through some of our links. The code that computes rankings has no access to commission data: it is kept in a separate module that cannot read which retailers pay us, and an automated test fails our build if that ever changes.

• 4 boxes of the pack size shown on the page (8 boxes for a 30-pack).
• One fixed set of lens parameters per lens design, so carts are comparable.
• Shipped to a fixed California ZIP code (92592), cheapest shipping option.
• No account, no login, no coupon codes typed in.

We add the cart, go as far as the order summary, and write down each line: subtotal, shipping, every fee by the name the retailer gives it, and any promotion applied automatically. We stop there. We never enter payment or personal details and never place an order.

checkout total = subtotal + shipping + fees − automatic promos
effective per-box price = checkout total ÷ boxes in the cart

Totals are before sales tax, because tax depends on where you live and is the same whichever retailer you choose.

Every price shows the date we last verified it. A price older than 10 days is marked stale. We keep showing it, with the badge, rather than hiding the retailer. Being honest about the age of a number matters more to us than looking complete.

Many retailers take a percentage off your first order. When we apply one to your personal price, it is an estimate, shown with a “~”, because the retailer decides the final terms at checkout.

Some links to retailers are affiliate links, which means we may earn a commission if you buy. This never changes a price you pay or where a retailer appears in our tables.

Anything you save with us is a set of reorder specs, not a prescription. Always order with a valid prescription from your eye care provider.