| 1 | Standard Edition and Applicability | Request a conformity statement that identifies the lens type, applicable standard edition, and scope of the claim. Check that the documentation applies to the specific product being purchased. | Direct: confirm applicability to progressive-power lenses and the declared edition. |
| 2 | Reference-Point Power Verification | Ask for the prescribed measurement locations, measurement method, and reported results for the ordered lens design and prescription. | Direct: assess relevant power requirements using the standard and product documentation. |
| 3 | Addition-Power Control | Confirm how addition power is specified, measured, and checked against the ordered prescription and the applicable acceptance limits. | Direct: verify against applicable progressive-lens requirements and declared product specifications. |
| 4 | Optical Performance Across the Lens | Request technical information describing the intended power distribution and the method used to assess optical performance across the usable lens area. | Related: use applicable standard requirements together with design-specific specifications; do not assume one design profile fits all products. |
| 5 | Measurement and Inspection Records | Check whether inspection records identify the test equipment, measurement conditions, sampled product or batch, and results against stated criteria. | Supporting evidence: records help demonstrate how declared conformity is checked. |
| 6 | Lens Markings and Identification | Review the product’s identification and fitting information, including how permanent engravings or temporary layout markings are interpreted where applicable. | Verify the relevant identification and marking provisions in the applicable standard and product documentation. |
| 7 | Prescription Range and Customization | Obtain the supplier’s current orderable range for sphere, cylinder, addition, material, diameter, and customization options. Confirm limits for the exact design. | Commercial and product-specific information; not a substitute for standard conformity checks. |
| 8 | Material and Product Declaration | Request declared lens material, refractive index, design options, and any relevant product documentation. Verify that the declaration matches the supplied item. | Supporting product information; confirm any additional material requirements separately. |
| 9 | Coatings and Surface Quality | Clarify which coatings are included and request the applicable test methods and acceptance criteria for coating performance and surface condition. | Check coating or durability claims against the relevant specifications or test standards; do not treat them as a general ISO 8980-2 rating. |
| 10 | Quality and Supply Controls | Assess batch traceability, complaint handling, change control, production capacity, lead-time commitments, and the scope of any quality-management certification. | Supplier due diligence: quality-system certification is separate from proving that a lens meets the applicable optical requirements. |