Overview
ISO 16671:2025 - Ophthalmic implants - Irrigating solutions for ophthalmic surgery (third edition) defines safety and performance requirements for ophthalmic irrigating solutions (OIS) used during ophthalmic surgery. Although OIS do not provide primary immunological, pharmacological or metabolic functions, the standard treats them as non‑solid medical devices that share certain risks with non‑active implants. ISO 16671:2025 covers intended performance, design attributes, preclinical and clinical evaluation, sterilization, packaging, labelling and the information supplied by the manufacturer.
Key topics and requirements
- Intended performance: Manufacturers must document functional characteristics (chemical composition, physical properties, intended surgical applications and effects on ocular tissues).
- Design attributes: Detailed requirements for chemical description, contaminants, water quality, and finished‑product characterization including:
- pH and buffering capacity
- Osmolality
- Spectral transmittance
- Particulate contamination (visible and sub‑visible)
- Design evaluation:
- Biological safety per ISO 10993 series (including bacterial endotoxins testing and intraocular irritation/inflammation assessment)
- Clinical evaluation and clinical investigation requirements (Annex F normative)
- Sterilization: Guidance and risk considerations for sterilization methods (including ethylene oxide - EO) and validation per ISO 11135.
- Product stability: Real‑time shelf‑life testing required; accelerated testing optional.
- Packaging and sterile barrier systems: Protection during storage/transport and maintenance of sterility per ISO 11607.
- Information supplied and labelling: Required manufacturer information, symbols and instructions aligned with ISO 20417 and ISO 15223‑1.
- Risk management: Application of ISO 14971 to identify and mitigate hazards and justify omitted attributes.
The standard includes multiple annexes with test methods and guidance (pH/buffer examples, particulate test methods, intraocular irrigation tests, clinical investigation design, sample size and data analysis).
Applications and who uses it
ISO 16671:2025 is intended for:
- Medical device manufacturers developing or producing ophthalmic irrigating solutions
- Regulatory and quality teams preparing technical files and regulatory submissions
- R&D and formulation scientists validating chemical and physical properties (pH, osmolality, particulates)
- Sterilization and packaging engineers designing sterile barrier systems and validating EO or other sterilization processes
- Clinical investigators and CROs planning preclinical and clinical evaluations in ophthalmic surgery
Practical uses include product development, preclinical/clinical study design, sterilization validation, shelf‑life determination, packaging design, labelling compliance and overall risk management.
Related standards
Key normative references cited in ISO 16671:2025 include ISO 10993‑1, ISO 11135, ISO 11607‑1, ISO 13408‑1, ISO 14155, ISO 14971, ISO 20417, and relevant pharmacopeial water standards (Ph. Eur., USP).
