Don't let your pre-tax health care expense dollars go to waste! Felix Gray glasses can be covered directly through your flexible spending account (FSA) or health savings account (HSA) since most providers reimburse for blue light blocking lenses. After purchasing, you can find your detailed invoice receipt if you log into your account, click on the relevant order number, and click on the "Invoice" button. Reach out to help@shopfelixgray.com for any additional questions.