ISO 12870:2016

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 8624 (measuring system and terminology)
• ISO 7998 (vocabulary)
• ISO/TS 24348:2014 (nickel release simulation and wear)
• ISO 11380 / ISO 11381 (formers and screw threads)
• EN 16128:2015 (regional reference related to nickel)

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.