Overview
EN ISO 9241-333:2017 - "Ergonomics of human‑system interaction - Part 333: Stereoscopic displays using glasses" - specifies ergonomic performance requirements and test methods for stereoscopic displays that use glasses to produce binocular parallax. The standard focuses on reducing visual fatigue and ensuring comfortable, effective viewing in business and home leisure contexts (e.g., movies, games) under dark environment conditions. It applies to temporally or spatially interlaced display types implemented in flat‑panel and projection displays.
Key topics and technical requirements
- Ergonomic performance specifications: requirements are stated as measurable outcomes (not only design recommendations) to support objective conformance testing.
- Viewing conditions: design viewing distance and viewing direction / angle of inclination and azimuth are defined to match intended use.
- Luminance requirements: illumination, display luminance and ambient test conditions are addressed to control viewing comfort.
- Visual artefacts and fidelity: criteria and tests for luminance non‑uniformity, interocular luminance difference, and interocular crosstalk (ghosting) that can cause visual fatigue.
- Optical laboratory test methods (Clause 6): structured measurement procedures, test patterns, accessory requirements, meter alignment, angular and temporal measurement considerations.
- Named measurement procedures: examples in the document include P 333.1 (luminance angular distribution), P 334.1 (luminance angular uniformity), P 337.1 (interocular luminance difference), P 338.1 (interocular crosstalk).
- Analysis and conformance (Clause 7): compliance routes, conformance assessment, and evaluation procedures for design verification.
- Informative Annexes: Annex B lists measurement procedures; Annex C provides technical explanations of display technologies.
Applications and who uses this standard
EN ISO 9241-333:2017 is practical for:
- Display manufacturers designing stereoscopic TVs, monitors and projectors that require certification or ergonomic design validation.
- Test laboratories and QA teams performing optical and ergonomic conformance measurements.
- Ergonomists, UX/HCI designers and product designers assessing human-system interaction and reducing visual fatigue.
- Procurement and regulatory teams specifying ergonomic acceptance criteria for stereoscopic display products used in offices, training, entertainment and simulation.
- R&D teams evaluating stereoscopic performance (crosstalk, luminance uniformity) across different glasses-based technologies.
Keywords: EN ISO 9241-333:2017, stereoscopic displays using glasses, ergonomics, visual fatigue, interocular crosstalk, luminance uniformity, test methods, design viewing distance.
Related standards
- ISO 9241-303 - display hardware aspects for general VDUs and head-mounted displays (related).
- ISO/TR 9241-331 - optical characteristics of autostereoscopic displays (no glasses).
- ISO 9241 series - broader ergonomics of human-system interaction; this part addresses stereoscopic-specific considerations.
Use EN ISO 9241-333:2017 when you need objective, laboratory‑grade methods and ergonomic performance criteria for glasses‑based stereoscopic displays.
