Overview
SIST EN ISO 10322:2026 - Ophthalmic Optics: Semi-Finished Blanks is an international standard specifying the requirements for the optical and geometrical properties of semi-finished lens blanks used in ophthalmic applications, including spectacles. Developed by the Slovenian Institute for Standardization (SIST) in collaboration with ISO and CEN, this standard ensures that semi-finished blanks adhere to consistent quality and performance criteria, promoting safety, interchangeability, and reliability in the optical industry.
This 2026 edition consolidates and updates previous parts (replacing SIST EN ISO 10322-1:2016 and SIST EN ISO 10322-2:2016) into a single, comprehensive framework for manufacturers, laboratories, and suppliers handling ophthalmic lens blanks.
Key Topics
- Scope and Purpose: Sets out optical and geometrical specifications for all types of semi-finished lens blanks intended for further finishing into spectacle lenses.
- Classification: Semi-finished blanks are categorized by finished surface types:
- Single-surface-power blanks (spherical, aspherical, cylindrical, toroidal)
- Multifocal blanks
- Power-variation blanks
- Optical Requirements: Defines tolerances for:
- Surface spherical power
- Surface cylindrical power
- Uniformity across finished surfaces
- Addition power (for multifocal and power-variation blanks)
- Geometrical Tolerances: Details for:
- Blank sizes: nominal, actual, usable dimensions
- Thickness, both center and edge, with strict tolerances
- Segment geometry and position for multifocal blanks
- Orientation for polarizing blanks
- Test Methods: Standardized procedures for measuring optical powers, geometrical features, and segment geometry, including both reflection and transmission methods.
- Marking and Packaging: Requirements for clear labeling, blank identification, and packaging to ensure proper handling and traceability.
Applications
SIST EN ISO 10322:2026 is highly relevant in several practical contexts within ophthalmic optics:
- Lens Manufacturing: Used by lens blank manufacturers to guarantee that semi-finished products conform to documented tolerances and requirements. Facilitates quality control and certification processes.
- Quality Assurance and Testing: Laboratories and optical workshops reference this standard for routine inspection, verification, and measurement of blank parameters before further processing or shipment.
- Spectacle Lens Production: Ensures that semi-finished blanks meet prerequisites for precision finishing, such as cutting, edging, and surfacing, to produce prescription spectacle lenses.
- International Trade: Harmonized technical specifications support smooth exchange and acceptance of blanks across borders, minimizing disputes and returns.
- Product Development: R&D in ophthalmic optics utilizes the standard to design new lens forms, including multifocal and advanced power-variation blanks, with consistent evaluation procedures.
Related Standards
For complete application and understanding of SIST EN ISO 10322:2026, consider these directly referenced or associated standards:
- ISO 7944: Optics and photonics - Reference wavelengths
- ISO 8598-1: Optics and optical instruments - Focimeters - Part 1: General purpose instruments
- ISO 13666: Ophthalmic optics - Spectacle lenses - Vocabulary
- ISO 14889:2025: Ophthalmic optics - Spectacle lenses - Fundamental requirements for uncut finished lenses
- ISO 8980-1 and ISO 8980-2: (For test method harmonization related to addition and power-variation measurements)
- ISO/TR 28980: (For technical guidance on measurement issues)
Practical Value
Adopting SIST EN ISO 10322:2026:
- Guarantees Consistency: Ensures lens blanks from different sources meet uniform requirements.
- Enhances Safety and Performance: Minimizes variability in optical properties, directly affecting wearer comfort and vision quality.
- Facilitates Compliance: Supports regulatory and industry compliance for manufacturers and optical labs.
- Streamlines Global Supply Chains: Provides a foundation for international contracts and procurement in the ophthalmic optics sector.
Keywords: SIST EN ISO 10322:2026, ophthalmic optics, semi-finished blanks, spectacle lenses, optical standards, lens manufacturing, quality assurance, multifocal blanks, power-variation blanks, geometrical tolerances.