You do not need to buy from the practice that fitted you, and they cannot require it. Federal law says your prescription is yours, handed over automatically once the fitting is complete. What follows is the practical process, and the three places it goes wrong.
Step 1: get your prescription
Your prescriber must give you a copy whether or not you ask, at no extra charge, with no purchase requirement and no waiver to sign. That is 16 CFR Part 315 — see your rights.
Photograph it the day you receive it. You will need: both eyes’ power, base curve, diameter, the brand, and the expiry date. If you have astigmatism, also cylinder and axis; if presbyopia, the add.
Step 2: check it is still valid
Minimum one year from issue under federal law, longer in several states — see the state breakdown. The clock runs from issue, not from your first order.
No legitimate seller can fill an expired prescription. Options if yours has lapsed: here.
Step 3: compare properly
Three things, not one:
- Price per box — and check the box count; 30-packs and 90-packs are easy to confuse
- Shipping — a low unit price with expensive shipping is not a low price
- Rebates — annual-supply rebates are frequently worth more than the difference between any two retailers, and some sellers process them for you
See current prices, where to buy, and our reviews: 1-800 Contacts, Lens.com, Costco, Walmart, ContactsDirect, LensDirect.
Step 4: expect verification
You enter your prescriber’s details; the seller contacts them to verify. This is required by law, and it is a sign the seller is legitimate rather than an obstacle.
Under the passive verification rule, if your prescriber does not respond within eight business hours, the prescription is deemed verified and the order ships. Business hours means 9am to 5pm weekdays, excluding federal holidays — so an order placed Friday evening may not clear until Tuesday. See how verification works.
The three things that go wrong
1. Brand substitution. A seller may not supply a different brand than the one written. “Comparable” means the power matches — base curve, diameter, material and oxygen transmission do not transfer. If a retailer offers this, decline, and see how to report it.
2. Sites that skip verification. “No prescription needed” means operating outside the law, with no assurance about what you receive. See is it safe to buy online.
3. Ordering the wrong box. Check the pack size and that you have ordered for both eyes — different powers are easy to transpose.
Step 5: check what arrives
Before opening anything:
- Brand and product name exactly as prescribed
- Power, base curve, diameter — and cylinder and axis if applicable
- The expiry date on the boxes; a long-dated supply is what you want
- Intact blisters — any that look depressed or unsealed go back
If anything differs from the prescription, do not wear it. Contact the seller.
Before you buy a year’s supply
Check the return policy. If your prescription changes mid-year, unopened boxes are often returnable — and the policies differ a lot. Walmart allows 90 days, ContactsDirect six months, LensDirect 30 days or 365 for a fee.
That is real money if your prescription is still changing.
General information, not legal advice. Reviewed by Dr. Teresita Bollar, OD.
