Overview - ISO 12870:2016 (Spectacle frames, ophthalmic optics)
ISO 12870:2016 is an international standard that specifies requirements and test methods for unglazed spectacle frames intended for use with prescription lenses. It applies at the point of sale (manufacturer/supplier to retailer) and covers all common frame types - rimless, semi-rimless, folding frames and frames made from natural organic materials (e.g., horn, wood, bamboo). The standard is not intended for complete custom-made frames or products designed specifically as personal eye protection.
Key technical topics and requirements
ISO 12870:2016 defines fundamental requirements and laboratory test methods across several technical areas:
- Physiological compatibility
- Construction and general compatibility of frame parts that contact the wearer; requirements to avoid sharp edges and irritants.
- Nickel release and guidance on clinical evaluation where relevant (see referenced ISO/TS 24348:2014 and Annex C for regional considerations).
- Measurement system and dimensional tolerances
- Standardized measurement terminology and tolerances for nominal size and screw threads (references such as ISO 8624).
- Dimensional stability and environmental resistance
- Tests for stability at elevated temperature and resistance to perspiration to assess durability of materials and finishes.
- Mechanical stability and endurance
- Bridge deformation, lens retention characteristics and endurance (fatigue) testing to verify structural performance.
- Safety and optical properties
- Resistance to ignition and resistance to optical radiation - tests to assess fire risk and light-related durability.
- Sampling, preparation and conditioning
- Rules for selection of test samples, conditioning (test lenses, environmental conditions) and compliance assessment.
- Marking and manufacturer information
- Requirements for marking and additional information suppliers must provide at market placement.
Practical applications - who uses ISO 12870:2016
- Spectacle frame manufacturers and designers - for product design, material selection, and ensuring frames meet international performance and safety expectations.
- Quality assurance and testing laboratories - to perform standardized tests (dimensional, mechanical, chemical resistance, nickel release simulation).
- Suppliers and retailers - to verify incoming product compliance prior to sale.
- Regulators and conformity assessors - to reference harmonized test methods and essential requirements, especially where regional legislation overlaps (e.g., nickel release in the EU).
Related standards
ISO 12870:2016 helps manufacturers, labs and regulators ensure spectacle frames are safe, durable and fit for purpose by providing harmonized test methods and performance requirements for non‑custom ophthalmic frames.
