Overview
EN ISO 11979-6:2014 - "Ophthalmic implants - Intraocular lenses - Part 6: Shelf-life and transport stability testing" specifies how to determine the shelf-life and transport stability of sterile intraocular lenses (IOLs) in their final packaging. It defines requirements for planning and conducting stability, package integrity and transport studies, and for documenting test methods and results to support labeling, expiration dating and safe distribution.
Key topics and requirements
- Scope and purpose: Establishes tests and study design to demonstrate that IOL performance, safety and acceptability remain within specifications during storage and distribution.
- Risk-based approach: Requires a risk analysis per ISO 14971 to decide whether product stability, package integrity or transport studies are needed and to justify test selection.
- Study protocol: A documented protocol must be prepared before testing; results must demonstrate compliance with finished product specifications or applicable ISO 11979 limits, or be compared to time‑zero product.
- Test articles: Studies use finished IOL lots (or finished injector systems with IOLs). If resterilization is possible, stability samples should have undergone the maximum allowed sterilization cycles.
- Real-time and accelerated testing:
- Accelerated studies are acceptable for initial shelf-life claims but must be verified by a subsequent real‑time study.
- A maximum of five years shelf-life may be claimed initially from either real-time or accelerated studies; real-time results take precedence.
- Sampling and test selection:
- For optical-power–sensitive parameters, test low/medium/high dioptric groups.
- Sample sizes and guidance are provided in Annex A; suggested tests and methods appear in Annex B.
- Test methods not in Annex B must be documented and validated.
- Package integrity and transport: Includes procedures to assess sterile barrier performance and IOL stability during distribution and transport.
Practical applications
- Supports labeling decisions (expiration date and storage/transport conditions) for IOL manufacturers.
- Validates packaging systems and sterilization processes in line with product stability needs.
- Informs supply chain and distribution controls to preserve IOL safety and efficacy.
- Used by contract testing labs, quality assurance, regulatory affairs, and notified bodies reviewing technical documentation for market approval.
Who uses this standard
- IOL manufacturers and R&D teams
- Packaging engineers and sterilization specialists
- Quality control and regulatory affairs professionals
- Contract testing laboratories and conformity assessment bodies
Related standards
Keywords: EN ISO 11979-6:2014, intraocular lenses, IOL shelf-life testing, transport stability, packaging integrity, accelerated ageing, real-time stability, ISO 14971.
