I should have said "won't try to force you to buy something," since as I pointed out in another comment they're required by the FTC to give you your prescriptio

I should have said "won't try to force you to buy something," since as I pointed out in another comment they're required by the FTC to give you your prescription. https://www.consumer.ftc.gov/articles/0116-prescription-glasses-and-contact-lenses https://www.consumer.ftc.gov/articles/0116-prescription-glas... Unfortunately it looks like IPD is not covered in that, but I'm sure the independent optometrists at Costco would be willing to measure it no-strings-attached since they're not selling you glasses.