Overview
ISO 8980-3:2022/Amd 1:2026 is an Amendment to the recognized international standard governing uncut finished spectacle lenses, specifically focusing on transmittance specifications and test methods. Developed by the International Organization for Standardization (ISO), this amendment clarifies requirements for the transmittance properties of ophthalmic spectacle lenses, updates testing methodologies, and aligns information provision with evolving digital formats.
Key elements introduced or modified in this amendment improve accuracy, transparency, and consistency in the specification and testing of lens transmittance, including the introduction of requirements for cut-off wavelength claims and updated guidance on measurement uncertainty. Manufacturers, suppliers, testing laboratories, and regulatory authorities will benefit from the enhanced clarity and advanced verification methods described.
Key Topics
- Transmittance Specifications: The amendment enhances requirements for spectral transmittance, including how properties and claims must be stated and verified for uncut finished spectacle lenses.
- Cut-off Wavelength (Longueur d'onde de coupure): Introduces definitions, test requirements, and measurement criteria for lenses that claim specific ultraviolet or blue light cut-off wavelengths.
- Measurement Uncertainty: Refines acceptable uncertainty thresholds in measuring spectral transmittance for greater reproducibility and reliability.
- Testing Methods: Specifies the use of advanced spectrophotometric equipment and details methodologies that maintain a high confidence level (95%) for all spectrophotometric measurements.
- Provision of Information: Expands the acceptable ways manufacturers may supply product data to include digital forms such as QR codes or electronic documentation, augmenting traditional labeling.
- Instrument and Sample Considerations: Annexe guidance addresses how lens geometry and measurement device characteristics can impact reported transmittance results.
Applications
ISO 8980-3:2022/Amd 1:2026 offers critical guidance for stakeholders throughout the ophthalmic optics industry:
- Manufacturers: Ensures that product claims regarding transmission characteristics (such as blue light blocking or UV protection) are accurately measured and verifiable using globally accepted methods.
- Quality Control and Testing Laboratories: Standardizes the procedures and uncertainty calculations for evaluating spectral transmittance, supporting consistent testing across different facilities and geographies.
- Product Development: Assists R&D teams in designing lenses that meet precise spectral transmission and cut-off performance, ensuring compliance from the early stages of development.
- Regulatory Authorities: Provides a harmonized basis for market surveillance and conformity assessment, supporting consumer protection and international market access.
- Distributors and Retailers: Facilitates clear and consistent communication of performance properties, including through digital means, supporting consumer confidence and regulatory compliance.
Related Standards
Several international standards complement or are referenced alongside ISO 8980-3:2022/Amd 1:2026:
- ISO 8980-3:2022 - The parent standard detailing transmittance specifications and test methods for uncut finished spectacle lenses.
- ISO 18526-2:2020 - Provides further guidance on uncertainty evaluation for spectroscopic measurements in optical test methods.
- ISO/IEC Guide 98-3 - Specifies general methods for expressing and calculating measurement uncertainty.
- Other ISO 8980 Series Standards - Cover additional aspects of uncut spectacle lenses, including tolerances, power measurement, and material specifications.
Practical Value
This amendment to ISO 8980-3 ensures global harmonization of testing and claims for lens transmittance, particularly in the evolving fields of UV protection and blue light filtering. By setting robust test methods and clarifying information requirements, the standard empowers the industry to deliver safer, more reliable ophthalmic products to consumers and supports regulatory objectives for public health and safety.
