When you order contact lenses online and type in your doctor’s name instead of uploading a prescription, the seller does not wait for your doctor to approve it. They send a request, start a clock, and if nobody answers in eight business hours the law treats your prescription as verified.
Silence is a yes. That is the actual design, and understanding it explains most of what people find strange about buying lenses online.
What the seller has to send
A verification request is not a phone call asking “is this person OK?”. 16 CFR §315.5(b) requires the seller to transmit a specific package of information:
- Your full name and address
- The lens power, manufacturer, base curve or designation, and diameter
- The quantity ordered
- The date you placed the order and the date and time the verification request was sent
- The seller’s contact details
That level of detail exists so the prescriber can compare it against the chart and object to something specific — the wrong brand, the wrong power, an expired prescription.
Eight business hours is longer than it sounds
Here is the part people misread. Under §315.2, a “business hour” means an hour between 9 a.m. and 5 p.m., Monday through Friday, excluding federal holidays.
Eight of those is one full working day. And the clock only runs during those windows:
- A request sent Tuesday at 10 a.m. expires Wednesday at 10 a.m.
- A request sent Friday at 3 p.m. has two hours on Friday and runs until Monday at 1 p.m.
- Add a federal holiday and it stretches further still
So an order placed on a Friday night can sit for three calendar days before the seller is entitled to ship. That is not the retailer being slow. It is the rule.
Passive verification: what happens when nobody replies
§315.5(c)(3) deems the prescription verified if the prescriber “fails to communicate with the seller within eight (8) business hours.”
This is called passive verification, and it is deliberate. Congress and the FTC concluded that a prescriber’s inaction should not be able to block a lawful purchase — because a prescriber who also sells lenses has an obvious incentive not to answer.
The consequence is worth stating plainly: a prescription that has quietly expired can pass verification if nobody at the practice looks at the fax. The system leans toward letting you buy. If you are ordering on an old prescription, the fact that the order went through is not evidence that it was still valid.
What a seller is not allowed to do
§315.5(f) forbids a seller from altering your prescription — and the rule specifically names substituting “a manufacturer or brand other than that specified” unless you asked for it.
This matters more than it sounds. Contact lenses are not interchangeable. Two monthly silicone hydrogels from different manufacturers have different materials, oxygen transmissibility, edge profiles and diameters, and they sit differently on the eye. Substituting one for another is not like swapping ibuprofen brands.
It is also not hypothetical. The clearest example we have written about is Hubble, whose business model turned on exactly this territory.
What to actually do
- Keep your own copy of your prescription. You have a legal right to it. Uploading it is faster than verification and removes the guesswork.
- Check the expiration before you order, not after. Passing verification does not mean your prescription was current — see our state-by-state expiry guide.
- Order the exact brand on the prescription. If a site nudges you toward its own equivalent, that is a different lens, and switching is a clinical decision.
- Open the box and read the label when it arrives. Brand, power, base curve, diameter. Compare against your prescription every time.
- If the wrong lens arrives, that is a rule violation, not a mix-up. Report it at ReportFraud.ftc.gov.
None of this is an argument against buying online — the price difference is real and our price index tracks it. It is an argument for knowing that the safety check between you and the wrong lens is thinner than most people assume.
General information about a federal regulation, not legal advice. Wearing lenses on an expired or incorrect prescription is a clinical risk regardless of whether an order was accepted. Reviewed by Dr. Teresita Bollar, OD.
