ISO 7998:2005

Overview

ISO 7998:2005 - Ophthalmic optics - Spectacle frames - Lists of equivalent terms and vocabulary provides a standardized vocabulary for spectacle frame parts and construction. The second edition (2005) defines commonly used terms and gives lists of equivalent terms in multiple languages - English, French, Russian, German, Italian, Spanish, American English, Japanese (with phonetic transcription) and Chinese - to support consistent technical communication across the ophthalmic optics and eyewear industries.

Key topics and requirements

• Terms and definitions: Clear, authoritative definitions for components and features of spectacle frames (scope limited to vocabulary; no technical performance specifications).
• Multilingual equivalence lists: Mapped terminology across the included languages to reduce ambiguity in design, manufacturing and documentation.
• Frame types covered: Plastic frames and natural organic-material frames, metal frames, and combination frames (including Type A and Type B constructions).
• Special constructions: Vocabulary for rimless and semi-rimless mounts.
• Detailed parts vocabulary: Sidepieces (temples), joints (hinges), types of lugs, pads (nosepads) and other specific frame parts.
• Measurement references: Terms related to frame measurement, including the measuring system defined in ISO 8624.
• Formers and templates: Terminology for formers used in frame manufacture.
• Publishing and reproduction: The standard permits reproduction of its terms and definitions for educational or implementation use, provided they are unmodified and the source is cited.

Applications

• Standardizes technical documentation, assembly instructions, catalogs and CAD libraries for eyewear designers and manufacturers.
• Supports accurate product labeling and multilingual user manuals for international markets.
• Aids opticians, optometrists and eyewear retailers in consistent terminology for fitting, repair and sales.
• Useful for translators and regulatory bodies to ensure precise cross‑language communication in procurement, certification and compliance.
• Serves educational and training materials within optics programs and company onboarding.

Who should use ISO 7998:2005

• Eyewear and spectacle frame manufacturers and designers
• Optical laboratories and fitting/repair technicians
• Standards committees and regulatory authorities in ophthalmic optics
• Technical writers, translators and marketing teams preparing multilingual materials
• Educational institutions teaching ophthalmic optics and eyewear technology

Related standards

• ISO 8624 - Frame measurement system referenced by ISO 7998 for consistent dimensional terminology.

Keywords: ISO 7998:2005, spectacle frames, ophthalmic optics, vocabulary, eyewear terminology, multilingual terms, ISO 8624, frame measurement.