TS EN ISO 11979-1

TS EN ISO 11979-1 is a vocabulary standard for intraocular lenses, defining the terms used for these ophthalmic implants and for the methods associated with evaluating them. In practical terms, it provides a common language for devices placed inside the eye, where precise terminology matters for design, testing, clinical communication, and documentation.

Why the terminology around intraocular lenses matters

Intraocular lenses replace or supplement the optical function of the eye’s natural crystalline lens, most commonly in cataract-related surgery. Because these implants involve optics, material behaviour, geometry, and clinical outcomes, small differences in wording can lead to confusion when comparing products or discussing test results. This standard brings those core terms into a shared framework.

In general technical use, IOLs may be described by optical design, such as monofocal, multifocal, toric, or accommodating concepts. Evaluation may involve how the lens is positioned, how it interacts with the capsular bag, and how optical performance is discussed. This document is primarily about consistent terminology rather than prescribing the full technical performance requirements of the wider IOL family.

• Defines terms applicable to intraocular lenses.
• Covers terminology linked to methods used to evaluate them.
• Belongs to the ophthalmic implants and health technology vocabulary area.
• Supports consistent technical communication across languages and organisations.