ISO 8980-2-2017 PDF

Full title and description

Ophthalmic optics — Uncut finished spectacle lenses — Part 2: Specifications for power-variation lenses (ISO 8980-2:2017). This International Standard (3rd edition, 2017) specifies the title, classification and the general requirements and verification methods that apply to uncut finished power‑variation spectacle lenses (single‑vision, multifocal and power‑variation types).

Abstract

ISO 8980-2:2017 sets out requirements and test/verification methods for the optical and geometrical properties of uncut finished power‑variation spectacle lenses, including tolerances for back‑vertex power, cylindrical power and axis, addition/variation power, prism and related markings and dimensional checks. Measurement reference conditions (temperature, wavelengths) and the required instruments (for example focimeters conforming to ISO 8598‑1) are defined to ensure consistent verification.

General information

• Status: Published / Confirmed (International Standard, stage 90.93).
• Publication date: July 17, 2017 (2017-07).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 11.040.70 (Ophthalmic equipment / Ophthalmic optics).
• Edition / version: Edition 3 (2017).
• Number of pages: 8 (official ISO pagination).

Key bibliographic and lifecycle information as published by ISO.

Scope

This part of ISO 8980 specifies requirements and verification methods for the optical and geometrical properties of uncut finished power‑variation spectacle lenses. It applies to lenses classified as single‑vision, multifocal and power‑variation types and defines reference conditions (for example reference temperature 23 °C ± 5 °C and reference wavelengths), the required measuring instruments (focimeters conforming to ISO 8598‑1) and the reference points at which tolerances apply. The standard replaces the earlier 2004 progressive‑lens edition and broadens the text to cover power‑variation lenses generally.

Key topics and requirements

• Classification of finished lenses: single‑vision, multifocal, power‑variation.
• Reference conditions for verification: temperature (23 °C ± 5 °C) and specified reference wavelengths.
• Measurement methods: use of focimeters and procedures conforming to ISO 8598‑1 and related references.
• Optical tolerances: limits on back‑vertex (spherical) power and cylindrical power (tolerance bands that vary with power range).
• Cylinder axis tolerances: axis error limits that depend on cylinder magnitude.
• Addition/variation (near addition) tolerances for multifocal/power‑variation lenses.
• Prism: verification of total prism (including ordered and induced prism) and applicable prism tolerances at verification/reference points.
• Geometrical and marking requirements: dimensional checks, thickness, orientation marks, polarizing/transmission characteristics and information on packaging/labeling.
• Surface and material checks: general inspection requirements for surface quality and compliance with related uncut‑lens fundamentals (for example ISO 14889 and parts addressing transmittance and coatings).
• Verification record and manufacturer‑declared verification power: rules for applying the tolerances based on ordered or stated verification power.

These topics summarize the main technical requirements and verification points specified in the standard.

Typical use and users

Used by spectacle‑lens manufacturers, optical laboratories, quality assurance personnel, ophthalmic dispensers and standards bodies to define and verify finished (uncut) lens optical and geometric performance before delivery or mounting. Also referenced by regulatory and conformity assessment bodies, purchasing/specification teams and optical instrument manufacturers (focimeters and measuring equipment). Applications include production quality control, incoming‑goods inspection and acceptance testing of supplied lenses.

Related standards

Closely related and frequently cross‑referenced documents include: ISO 8980‑1 (specifications for single‑vision and multifocal uncut lenses), ISO 8980‑3 (transmittance specifications and test methods; later editions published), ISO 8980‑4 (anti‑reflective coatings and related methods), ISO 8980‑5 (abrasion‑resistant surface requirements), ISO 14889 (fundamental requirements for uncut finished lenses), ISO 8598‑1 (focimeters — general purpose instruments) and ISO 21987 (mounted spectacle lenses). These documents together form the normative framework for finished spectacle lens specification and verification.

Keywords

uncut finished spectacle lenses; power‑variation lenses; progressive lenses; back‑vertex power; cylinder tolerance; axis tolerance; addition/variation power; prism; focimeter; verification; ophthalmic optics; ISO 8980

FAQ

Q: What is this standard?

A: ISO 8980‑2:2017 is an International Standard specifying requirements and verification methods for the optical and geometrical properties of uncut finished power‑variation spectacle lenses (3rd edition, published 17 July 2017).

Q: What does it cover?

A: It covers classification of finished lenses (single‑vision, multifocal, power‑variation), reference verification conditions (temperature, wavelengths), required measuring instruments and procedures, tolerances for back‑vertex power, cylindrical power and axis, addition/variation (near) power, prism verification, and marking/packaging and basic surface/material checks.

Q: Who typically uses it?

A: Manufacturers of spectacle lenses, optical laboratories and measurement/QA teams; optometrists and dispensing opticians involved in acceptance testing; suppliers of measuring instruments; regulatory and conformity assessment organizations involved with ophthalmic optics.

Q: Is it current or superseded?

A: ISO 8980‑2:2017 superseded the 2004 edition (and its corrigendum). The 2017 edition is published and listed as confirmed (stage 90.93) by ISO; it remains the current ISO edition for Part 2 as published on 17 July 2017. Users should check national adoptions or later revisions before assuming no newer amendments exist.

Q: Is it part of a series?

A: Yes — ISO 8980 is a multipart series addressing uncut finished spectacle lenses; Part 1 covers single‑vision and multifocal lenses, Part 2 covers power‑variation lenses, Part 3 covers transmittance specifications and test methods, Part 4 covers coatings, Part 5 covers surface abrasion requirements, and other related ISO documents cover vocabulary and mounted lenses.

Q: What are the key keywords?

A: Uncut finished spectacle lenses; power variation; progressive; back‑vertex power; cylinder; axis; prism; focimeter; verification; ophthalmic optics; tolerances.