First, contact your carrier and double-check the balance on your FSA account. You’ll need an up-to-date prescription and your pupillary distance, which can be measured at https://www.quay.com/pages/virtual-try-on. If you don’t have a valid prescription, you can choose to send it later too. You can place an order online and apply your FSA or HSA card to the order. Here’s how: You can place an order online and apply your FSA or HSA card to the order. Here’s how: Create or log in to your Quay account. Add an Rx frame to your cart and then upload, renew, or send your prescription later. Complete the checkout process by using your FSA or HSA card as you would any other credit card.