Overview

SIST EN ISO 8980-4:2026 specifies requirements and test methods for the properties of anti-reflective coatings and hydrophobic coatings applied to uncut finished spectacle lenses. Developed by the Slovenian Institute for Standardization (SIST), this document outlines both optical and non-optical properties essential to lens coating performance, such as reflectance characteristics, water repellency, and durability. This part of the ISO 8980 series focuses exclusively on coatings, making it an important reference for manufacturers, laboratories, and quality assurance professionals in the ophthalmic optics industry.

The standard does not address requirements and test methods already covered in other parts of the ISO 8980 series, nor does it encompass the color of reflected light.

Key Topics

Optical and Non-Optical Requirements:
- Specifications for anti-reflective and hydrophobic coatings.
- Performance parameters including luminous and mean reflectance, contact angle, and durability.
Test Methods:
- Procedures for determining reflectance using spectrophotometric equipment.
- Methods for measuring water repellency via static contact angle.
- Durability evaluation with environmental and rubbing simulations.
Usable Coated Area:
- Requirements for the diameter of functional coating coverage on lenses.
Durability Assessment:
- Criteria for resistance to deterioration such as delamination or loss of coating adhesion in normal use.
Reporting and Compliance:
- Guidance on the information to be provided upon request, including reflectance values and compliance declarations.

Applications

SIST EN ISO 8980-4:2026 finds practical use throughout the ophthalmic optics sector:

Manufacturing:
- Ensures consistency and quality of anti-reflective and hydrophobic coatings during lens production.
- Supports product development by setting clear benchmarks for coating performance.
Quality Assurance:
- Provides standardized testing routines for verifying coating properties such as reflectance, water repellency, and robustness.
- Enables manufacturers and independent laboratories to demonstrate compliance with international standards.
Product Labeling & Market Access:
- Facilitates claims about anti-reflective or hydrophobic performance backed by recognized assessments.
- Supports regulatory conformity and global trade by aligning with the ISO 8980 series.
End-User Value:
- Helps ensure that finished spectacle lenses provide the functional benefits advertised, such as clearer vision and easier cleaning.

Related Standards

ISO 8980-4 is part of a broader family of standards in ophthalmic optics, addressing other key aspects of spectacle lens manufacturing and performance:

ISO 8980-1: Specifications for single-vision and multifocal lenses.
ISO 8980-2: Specifications for progressive power lenses.
ISO 8980-3: Transmittance specifications and test methods.
ISO 14889: Fundamental requirements for uncut finished lenses.
ISO 13666: Vocabulary for spectacle lenses.

Other relevant standards referenced within ISO 8980-4 relate to test apparatus and substances:

ISO 48: Hardness determination in rubber.
ISO 3696: Specifications for laboratory water.

Practical Value

Adopting SIST EN ISO 8980-4:2026 supports a transparent, rigorous approach to quality assurance for spectacle lens coatings. This not only increases consumer trust but also streamlines international trade by providing clear and recognized criteria for coating performance. The standard is a valuable resource for anyone involved in the development, testing, or selection of finished spectacle lenses with advanced coatings, ensuring that products deliver reliable anti-reflective and hydrophobic benefits as expected in real-world use.

Overview

The standard does not address requirements and test methods already covered in other parts of the ISO 8980 series, nor does it encompass the color of reflected light.

Key Topics

Optical and Non-Optical Requirements:
- Specifications for anti-reflective and hydrophobic coatings.
- Performance parameters including luminous and mean reflectance, contact angle, and durability.
Test Methods:
- Procedures for determining reflectance using spectrophotometric equipment.
- Methods for measuring water repellency via static contact angle.
- Durability evaluation with environmental and rubbing simulations.
Usable Coated Area:
- Requirements for the diameter of functional coating coverage on lenses.
Durability Assessment:
- Criteria for resistance to deterioration such as delamination or loss of coating adhesion in normal use.
Reporting and Compliance:
- Guidance on the information to be provided upon request, including reflectance values and compliance declarations.

Applications

SIST EN ISO 8980-4:2026 finds practical use throughout the ophthalmic optics sector:

Manufacturing:
- Ensures consistency and quality of anti-reflective and hydrophobic coatings during lens production.
- Supports product development by setting clear benchmarks for coating performance.
Quality Assurance:
- Provides standardized testing routines for verifying coating properties such as reflectance, water repellency, and robustness.
- Enables manufacturers and independent laboratories to demonstrate compliance with international standards.
Product Labeling & Market Access:
- Facilitates claims about anti-reflective or hydrophobic performance backed by recognized assessments.
- Supports regulatory conformity and global trade by aligning with the ISO 8980 series.
End-User Value:
- Helps ensure that finished spectacle lenses provide the functional benefits advertised, such as clearer vision and easier cleaning.

Related Standards

ISO 8980-4 is part of a broader family of standards in ophthalmic optics, addressing other key aspects of spectacle lens manufacturing and performance:

ISO 8980-1: Specifications for single-vision and multifocal lenses.
ISO 8980-2: Specifications for progressive power lenses.
ISO 8980-3: Transmittance specifications and test methods.
ISO 14889: Fundamental requirements for uncut finished lenses.
ISO 13666: Vocabulary for spectacle lenses.

Other relevant standards referenced within ISO 8980-4 relate to test apparatus and substances:

ISO 48: Hardness determination in rubber.
ISO 3696: Specifications for laboratory water.

SIST EN ISO 8980-4:2026 PDF

Technical details

Abstract

Overview

Key Topics

Applications

Related Standards

Practical Value

Related standards

Abstract

Overview

Key Topics

Applications

Related Standards

Practical Value

Related standards

Ophthalmic optics — Uncut finished spectacle lenses — Part 4: Specifications and test methods for the propert…

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Ophthalmic optics - Uncut finished spectacle lenses - Part 2: Specifications for power-variation lenses (ISO…

Ophthalmic optics - Spectacle lenses - Fundamental requirements for uncut finished lenses (ISO 14889:2025)

Ophthalmic optics - Spectacle lenses - Vocabulary (ISO 13666:2019)

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