TS EN ISO 7998

TS EN ISO 7998 is a vocabulary standard for ophthalmic optics that organises the common terminology used for spectacle frames and their parts. Its main value is conceptual consistency: it helps different languages and technical communities refer to the same frame component in a comparable way, which is especially useful in product descriptions, technical files, and multilingual communication.

How the equivalent-term lists are organised

According to its scope, the standard covers common terms related to spectacle frames and provides equivalent designations for the parts of those frames in Turkish, English, French, Russian, German, Italian, Spanish, American English, Japanese, and Chinese. In general technical terms, a vocabulary standard does not primarily define performance requirements; instead, it clarifies what each name means and how equivalent expressions are aligned across languages.

Why terminology matters in spectacle-frame products

A spectacle frame is made up of several functional elements such as the front, temples, bridge, hinges, and other small parts, and those elements may vary by design, material, and construction. Consistent terminology reduces ambiguity in procurement, manufacturing, cataloguing, maintenance, and spare-part identification. For ophthalmic products, that shared language is important because the same physical part may be described differently across markets unless the vocabulary is standardised.

• Focuses on terms for spectacle frames and their parts.
• Provides equivalent technical names across multiple languages.
• Supports terminology alignment rather than performance testing.
• Useful for ophthalmic optics documentation and product communication.