Pick the buying situation first, then choose the retailer route that gives the right balance of price, fit confidence and aftercare.
Use the route finder below if you already know the job. If the order involves varifocals, a strong prescription, driving glasses or uncertain measurements, treat support and remake terms as more important than the lowest advertised frame price.
| Buying job | Start with | Use instead if | Main risk |
|---|---|---|---|
| Cheap spare pair | Cheap glasses guide | Fit is uncertain | Lens upgrades change the finished price |
| First online order | Best online glasses | You need store support | Frame fit and PD mistakes |
| Varifocals | Varifocal guide | You have never worn varifocals | Fitting height and remake terms |
| Strong prescription | Strong prescription guide | You want large frames | Thickness, weight and edge appearance |
| Prescription sunglasses | Sunglasses guide | You need night-driving help | Tint suitability, UV and delivery timing |
| Keep existing frames | Reglazing guide | The frame is damaged or low value | Postage, frame condition and lens choice |
Online glasses can be a good route for simple, non-urgent orders, especially when you already know the frame size and can compare the finished basket. The same route becomes riskier when lens centration, fitting height, strong prescriptions, varifocals or aftercare matter more than the headline price.
Before ordering, check four things: whether the prescription is current, how PD or fitting measurements are handled, whether the frame shape suits the lens type, and what happens if the finished glasses feel wrong. For made-to-prescription eyewear, returns and remakes are often more important than a small discount.
Simple single-vision, spare pairs, familiar frame sizes, low or moderate prescription strength and non-urgent orders.
First varifocals, strong minus lenses, very large frames, uncertain PD, progressive lenses, workplace lenses and driving-specific glasses.
When fitting, adjustment, lens advice, aftercare or remake confidence matters more than saving money.
The route finder is based on consumer-fit risk, not commission. NHS guidance says PD is not legally required on a prescription and that correct lens centring is part of the fitting process. The College of Optometrists has warned that online spectacle orders can have higher risk where measurements are supplied incorrectly. GOC business standards also make clear that optical businesses are expected to meet standards covering conduct and clinical care.
| Evidence checked | Status |
|---|---|
| PD and prescription measurement context | Public guidance checked on 6 May 2026 |
| Online buying risk context | Professional guidance checked on 6 May 2026 |
| Affiliate influence | Route order based on buyer fit, not commission |
| Real order test completed | No |