ISO 16321-4:2025

Overview

ISO 16321-4:2025 - Eye and face protection - Part 4: Protection against biological hazards specifies minimum requirements for lightweight eye and face protectors intended to guard against biological hazards (for example, pathogenic micro‑organisms in human or animal bodily fluids). The standard covers single‑use (disposable) and re‑usable (disinfectable) products, including afocal (plano) and prescription lensed protectors, and was developed with lessons from the COVID‑19 pandemic. It excludes respiratory equipment for aerosols and protectors intended primarily for mechanical hazards, lasers, sports, or other specific hazards.

Key topics and technical requirements

• Scope and applicability: Protectors for healthcare, retail, transport and similar settings; applies to components that provide eye and face protection when incorporated into hoods or PAPR systems.
• Physical and optical properties: Requirements for transmittance, colour assessment, and sunglare filter marking and performance.
• Mechanical and physical performance: Robustness, temperature considerations (conventional ambient and optional extremes), and minor‑impact failure criteria to avoid secondary hazards.
• Protection area classifications: Defined Area to be protected - Type I, II, III, with corresponding performance expectations.
• Biological protection tests: Adoption of representative spurt and spray tests that use a headform, biofluid simulant and spray/spurt generator to assess protection against deposited bodily fluids.
• Aerosol considerations: Aerosol protection is optional in this part; respiratory protection for aerosols is covered by other standards.
• Cleaning and disinfection: Requirements and test methods for reusable/disinfectable protectors, plus guidance on cleaning.
• Marking and information: Mandatory markings on lenses and frames, packaging requirements, and manufacturer information to support selection and safe use.
• Annex A: Informative guidance on selection, use, maintenance and disposal of eye protection for biological hazards.

Practical applications

• Procurement and specification of PPE for hospitals, clinics, pharmacies, transport and retail staff, and other frontline workers exposed to body fluids.
• Design and conformity testing for manufacturers of face shields, safety spectacles and prescription lens protectors intended for infection control.
• Regulatory and compliance checks by safety officers, occupational hygienists and procurement teams specifying disposable vs. disinfectable eye/face protectors.
• Integration of eye components in hoods, full face respirators and PAPR headtops where the eye protection components must meet ISO 16321‑4 requirements.

Who should use this standard

• PPE manufacturers and product designers
• Healthcare facility safety managers and procurement teams
• Occupational safety professionals and testing laboratories
• Regulators and conformity assessment bodies

Related standards

• ISO 16321‑1 to ISO 16321‑3 (mechanical and other hazards)
• ISO 19818‑1 (laser protectors)
• ISO 18527 series (sports protectors)
• ISO/TS 16975‑4 (respiratory protection selection for aerosols)

Keywords: ISO 16321-4:2025, eye and face protection, biological hazards, PPE, spurt and spray test, reusable disinfectable, disposable eye protection.