Do not start with the product photo

A photo cannot confirm frame size, bridge width, temple length or material. Two frames can look almost identical on screen and still differ enough in their measurements to feel different after several hours of wear.

Open the specifications first. If you see numbers such as 52-18-140 and are not sure what they mean, use the eyeglass frame size article instead of estimating the fit visually.

Use a comfortable pair you already own as your reference

If you already have a frame that fits well, check the numbers printed inside the temple. Start with lens width, bridge width and temple length, then compare them with two or three frames in the LensCode eyeglasses collection .

The measurements do not need to match exactly. Bridge design, total width, lens shape and temple geometry can make two frames with similar numbers fit differently. Do not let the first number decide the whole comparison.

The actual measurements matter more than Small Medium or Large

Small, Medium and Large can be useful labels within a store, but they are not universal standards across every manufacturer and frame design. Millimetre measurements give you more useful information when you are comparing products directly.

Do not enter your prescription from memory

If you are ordering prescription lenses, open the prescription itself. Do not try to remember SPH, CYL, AXIS, ADD or another value from a previous order.

Follow the prescription-submission options shown in the current LensCode ordering flow. The LensCode FAQ explains how prescription information can be provided. You can also use the prescription glasses article when the prescription itself is driving the frame and lens decision.

Choosing the frame does not finish a prescription-glasses order

Current LensCode eyeglass PDPs include a separate Choose Lens step. Treat the frame and the lens configuration as two parts of the same order.

Measurements, material and shape describe the frame. Prescription information and lens options belong to the optical part of the order. A frame photo or frame price does not describe the finished prescription glasses.

Do not choose a lens upgrade from the name alone

If an additional lens option appears, check what it actually changes before selecting it. LensCode currently describes basic anti-reflective and scratch-resistant treatment and offers additional options through its lens-selection flow.

If blue-light filtering is one of the options you are considering, keep that evidence question in the blue-light glasses article rather than assuming the upgrade name automatically makes it necessary for your use.

Verify the frame material from the specifications

A frame that looks metallic is not automatically titanium. A thick frame that looks plastic is not automatically acetate. Use the material stated on the product page.

If material is part of your shortlist, use the eyeglass frame materials comparison for Titanium, Acetate and TR90, then return to the PDP you are considering.

Frame construction and frame material are different

Full-Rim, Semi-Rimless and Rimless describe how the frame holds the lenses. Titanium, Acetate and TR90 describe what the frame is made from.

If construction is what you are comparing, use Types of Eyeglass Frames rather than mixing construction and material into one decision.

Do not let face shape make the whole decision

Face-shape advice can help you narrow styles visually, but it does not compensate for a frame that is too wide, too narrow or uncomfortable at the bridge.

Once the measurements make sense, use the face-shape article for the styling part of the comparison.

Sunglasses need a slightly different specification check

With sunglasses, check the frame measurements, coverage and the UV specification stated on the PDP. Do not assume a darker lens provides stronger UV protection simply because it looks darker.

The American Optometric Association advises checking UV protection rather than using lens darkness as the test. LensCode's WAHAJ page, for example, explicitly states UV400.

Start from the sunglasses collection and verify the specification of each shortlisted model.

Read the full product page before adding the frame to cart

Do not stop at the model name and main image. Scroll to the specifications and check the selected colour, measurements, material if listed, frame construction and the lens-selection step for prescription orders.

Check the return and exchange terms before ordering

Do not wait until the glasses arrive to read the policy. Frames and sunglasses do not necessarily follow the same terms as prescription lenses prepared for a customer's measurements.

Open the current LensCode terms and policies before checkout, especially if you are trying a different frame size or ordering customised lenses.

Check shipping and payment information at the time of ordering

Delivery times and payment options can vary by market and can change. Use the options displayed during checkout or the current shipping and payment information instead of relying on an old screenshot or article.

Compare real LensCode products before you decide

This table uses specifications shown on the current product pages. If a field is not stated on the PDP, it is left unspecified rather than guessed from the image.

A real comparison between two frames

Compare NOVA - Rose Pink at 55-18-138 mm, listed as Titanium and Rimless, with Luca at 54-17-142 mm, a rectangular frame described as metal.

This is not a better-versus-worse comparison. NOVA has a lens width and bridge that are each 1 mm larger, while Luca has temples that are 4 mm longer. The construction, shape and material description also differ. Those are the details worth comparing before checkout.

Checklist before you confirm the order

Frequently asked questions before buying glasses online

60-second checkout decision