I've been managing our company's eyewear procurement since 2021—roughly $180k annually across four vendors, about 600 pairs a year, split between safety eyewear for three warehouse locations and benefit-plan frames for our main office. Before that, I spent two years doing it the hard way: chasing late shipments, reconciling invoices that didn't match quotes, and once receiving 400 pairs of clip-ons that didn't fit a single frame we owned.

This is the checklist I wish I had on day one. Six steps, in the order I actually run them, plus a short section on mistakes I've already made so you don't have to.

When this checklist is worth pulling out

You're sourcing prescription eyewear in one of these situations: setting up or renewing a corporate safety-glasses program; buying benefit-plan frames in bulk; or running a small optical shop or distribution business that needs wholesale prescription glasses, custom prescription glasses, or custom clip-on sunglasses to round out a catalog. If you're buying a single pair for yourself, close this tab—this is written for people placing orders of 50+ units.

Here's the whole thing in one breath: write specs, verify the lab, lock down clip-on compatibility, get landed cost, nail down invoice and return terms, then run a small pilot. In that order. Most of the painful surprises I've run into came from doing steps 3 and 5 last instead of first.

Step 1: Write your spec sheet before you send a single RFQ

Honestly, this is the step that saved me the most pain. A vague "need 100 pairs of prescription glasses" email will get you a vague quote that leaves out half the costs and all the differences between lens options.

Here's what I include in the spec sheet:

  • Frame count by model, color, and size
  • Lens type: single-vision, progressive, or occupational—broken out by count
  • Prescription data: sphere, cylinder, axis, prism if any, plus pupillary distance for every pair
  • Coating requirements: anti-reflective, blue-light filter, scratch-resistant. Name the spec, not just the marketing term
  • If it's safety eyewear: state the impact standard explicitly (ANSI Z87.1 is what we use)
  • Packaging: polybag, case, or bulk

One check before you hit send: verify every prescription is current. Most vision prescriptions expire after one to two years. Suppliers will happily cut lenses to an expired Rx—that's on you, not them.

Step 2: Verify the lab, not the brochure

This is the step most first-time buyers skip. "We have ten years of OEM experience" is a marketing line, not evidence. What you actually want to know is who cuts the lenses and who checks them before they ship.

Ask directly: "Do you run your own lens lab, or do you outsource to a wholesale lab?" Both answers can work, but they mean different lead times. In-house labs typically run four to seven business days. Outsourced labs can add another three to five, and that buffer disappears the moment the lab hits a backlog.

Then ask for documentation. A decent supplier should be able to send:

  • The brand of lens blanks they use (premium, mid-tier, or house brand)
  • A sample QC report from a recent batch
  • Their defect rate—ask for an actual percentage, not "very low"
  • Whether the finished lens is surfaced and edged in-house or assembled from stock

If they can't provide any of the above, that's your answer. A supplier who can't produce a QC report on request probably doesn't have a QC process.

Step 3: Lock down clip-on compatibility before you place the order

This is the one that cost me two years and about forty orders to figure out properly. Custom clip-on sunglasses for prescription glasses are not universal. A clip-on designed for a 52-18-145 aviator will not fit a 54-16-140 rectangular frame, no matter what the listing says.

What most buyers miss is that you can't just match the front frame dimensions. You need the actual mold: the A, B, and ED measurements plus the bridge width. If your supplier doesn't ask for those numbers, they're either going to ship a generic clip-on or ask you to send reference frames.

My rule now: never approve a clip-on order, custom or otherwise, without a physical sample on the actual frame. Photos don't cut it. Renderings absolutely don't cut it. I've seen gorgeous product photos of clip-ons that popped off the frame the moment anyone moved.

One more thing: ask whether the clip is a "mother" or "daughter" fit. Mother fits attach to the frame front. Daughter fits attach over the lens edge. They're not interchangeable, and suppliers sometimes assume one without confirming.

Step 4: Get ladder pricing and a landed-cost breakdown

A unit price without freight and duty is not a price—it's a starting number. I've been burned by a quote that looked 18% cheaper than our incumbent, then landed 9% more expensive after freight, coating add-ons, and packaging.

Ask for a ladder pricing table across at least three quantity breaks—for example, 100, 500, and 1,000 pairs. Then ask for a separate line-item breakdown of:

  • Frame cost
  • Lens cost (single-vision, progressive, etc.)
  • Coating add-ons per lens
  • Packaging and case
  • Freight, and the Incoterm (FOB, CIF, DDP)
  • Duty and taxes expected at import

If a supplier can quote DDP (delivered duty paid), take it. It costs more on paper, but it turns landed cost into one number you can actually budget against. Also worth noting: non prescription glasses often carry a lower duty classification than prescription lenses, so if your order mixes both, ask the supplier to separate them on the commercial invoice. It makes a real difference at customs.

Step 5: Nail down invoice, returns, and warranty terms in writing

This is the step that quietly eats budgets. A vendor who can't produce a compliant invoice—with the correct VAT number, HS code, and line-item breakdown—will cost you hours on the finance side. In some cases, the whole expense gets rejected.

Before you sign anything, request:

  • A sample invoice from a recent shipment
  • The return policy: who pays return freight on defective units, and what counts as defective
  • The warranty window (typically 12 months for frame defects, less for coatings)
  • Replacement lead time for defective units

Here's the part I'd underline twice: get all of this in writing, on the quote or in the purchase order. A sales rep saying "we'll take care of it" is worth exactly nothing when finance is asking why forty pairs of lenses came in at the wrong prescription. If the paperwork doesn't match the promise, the paperwork wins.

Step 6: Run a pilot batch of 50–100 pairs

The last step before you commit to an annual contract is a pilot order. Not 20 pairs—20 pairs will almost always be perfect. Fifty to a hundred is enough to see how the supplier handles a real batch.

Run the pilot for at least three order cycles (for us, that's about six months) before signing an annual agreement. What you're measuring:

  • Actual lead time vs. quoted lead time
  • Lens consistency across pairs—check five at random under a lensometer
  • Packaging durability after shipping—open every tenth box
  • How they respond when something goes wrong—and something always goes wrong

Do not skip the response part (note to self: archive every pilot report, because they come up in annual reviews). I would rather work with a supplier who ships 2% slower but fixes problems in 48 hours than one who ships on time and disappears when a recall hits.

Mistakes I've already made, so you don't have to

Three things I wish I'd done differently, in order of how much they cost me:

1. Assumed the catalog price was the price. It's basically never the price. Freight, coating add-ons, duty, and defect replacement pushed my first order about 28% over what the catalog showed. Now I don't approve any order without a landed-cost number in hand.

2. Treated my QC process as their QC process. A supplier can have a great QC process and still ship you a bad batch—because their process checks their work, not the box before it leaves the dock. I now inspect one in ten pairs from every shipment. It takes an afternoon, and it's caught at least three issues that would have turned into returns.

3. Underestimated the last-mile cost. If your company distributes finished glasses from a central warehouse to regional offices, factor in domestic shipping. USPS First-Class Mail rates effective January 2025 are $0.73 for a standard letter and $1.50 for a large envelope, with $0.28 for each additional ounce (usps.com). Glasses cases usually push you into flat-mail territory, so plan on $1.50–$5 per shipment. Across 200 shipments a year, that's real money.

One last note on supplier claims. Per FTC advertising guidelines (ftc.gov), any claim a supplier makes about lens accuracy, impact resistance, or perfect fit has to be substantiated with evidence. When a vendor tells you they guarantee 100% prescription accuracy, ask to see the testing behind it. If they can't produce it, don't build your QC plan around it.

These six steps aren't glamorous, and none of them will impress anyone in a meeting. But they've kept my last four annual contracts within budget, and I've stopped eating the cost of my own mistakes. That's worth more than a pretty catalog.