What should be checked before finished glasses are delivered?

A finished pair is the result of refraction data, lens design, edging, mounting and fitting. Each step can be correct on its own yet the final pair can still be wrong if the pieces do not line up.

Final inspection therefore verifies both optical specifications and the mechanical, on-face condition of the eyewear.

01 · POWER VERIFICATION

Check the ordered powers at the correct reference points

Use a lensmeter to verify sphere, cylinder and axis, plus add power and prescribed prism when applicable. Progressive lenses require identification of the permanent engravings and reconstruction of the manufacturer’s verification points.

A correct number measured at the wrong location can be misleading, so the verification point is part of the procedure.

02 · CENTRATION

Power and placement are separate checks

Confirm monocular PD, required fitting height and the design reference points against the order. Compare right and left placement rather than checking only total PD.

A progressive lens can have correct powers yet perform poorly if the fitting cross is not positioned where the wearer’s pupil was measured in the final frame.

03 · LENS CONDITION

Inspect surfaces, coatings and processed edges

Look for scratches, coating defects, edge chips and the condition of grooves or drill sites. Clean the lenses first and inspect from more than one angle so residue is not mistaken for a coating defect.

For tinted, photochromic or mirrored orders, also compare right/left visual consistency and confirm the ordered treatment.

04 · MOUNTING STRESS

Check that the lens has not distorted the frame

An oversized lens can spread the eyewire, alter bridge or temple geometry, or change the frame curve. An undersized lens can move or come loose.

Full-rim, semi-rimless and rimless frames each require their own retention checks, including screws, cords, grooves and drill hardware where relevant.

05 · FRAME ALIGNMENT

Restore the frame after mounting

Check front alignment, temple opening, bridge or nose-pad position and the way the eyewire closes around the lenses. A frame that was aligned before edging can change during mounting.

Table-top symmetry is only a starting point; the final alignment must also make sense on the wearer’s face.

06 · FINAL FITTING

Verify the result on the wearer

With the glasses on the customer, recheck wearing height, bridge support, frame width, temple bend and the actual visual zones used for distance, intermediate and near when relevant.

In the United States, ANSI ASC Z80.1-2025 addresses verification points and tolerances for prescription ophthalmic lenses. In practice, the applicable local standard, manufacturer instructions and the specific order all need to be considered.

SOLUTION GUIDE

Final spectacle check

GLANOS LENS CHECK

A finished pair is a result that must be verified, not merely a product that has been assembled.

Final quality is the chain from prescription → layout → edging → verification → fitting.

CAUTION

Do not deliver a finished pair without optical and mechanical verification.

GLANOS EYEWEAR

Eyewear discomfort has a reason.