GB/T 10810.1-2025Uncut finished spectacle lenses - Part 1: Single-vision and multifocal (English PDF)

5.2.3 of this Edition; 5.1.4, 6.3 of Edition 2005);

d) Added measurement methods for lens size and thickness (see 5.3 of this Edition);

e) Added provisions for permanent marking of fixed focus lenses (see Chapter 6 of

this Edition).

The modification of this document uses ISO 8980-1.2017 "Ophthalmic optics -- Uncut

finished spectacle lenses -- Part 1.Specifications for single-vision and multi focal

lenses".

Compared to ISO 8980-1.2017, this document has undergone significant structural

adjustments. The comparison on structural numbering changes between two documents

can be found in Annex A.

The technical differences and reasons between this document and ISO 8980-1.2017 are

as follows.

- Replaced ISO 13666 with the normative reference GB/T 26397.Added terms and

definitions for verifying vertex power (see Chapter 3) to adapt to China's technical

conditions and increase operability;

- Replaced ISO 7944, ISO 8429, ISO 8598-1, ISO 8980-3, ISO 14889, and ISO

5.2.6 of ISO 8980-1.2017) to adapt to the standard system of GB/T 10810;

- Added prism base orientation (see 5.2.3) to adapt to China's technical conditions

and increase operability;

- Added geometric dimension testing methods (see 5.3) to adapt to China's technical

conditions and increase operability;

- Changed the requirements for single lens identification (see Chapter 7; Chapter 8

of ISO 8980-1.2017) to adapt to China's technical conditions and increase

operability.

This document has undergone the following editorial changes.

- To coordinate with the existing standards in China, the standard name is changed

to "Uncut finished spectacle lenses -- Part 1.Single-vision and multifocal".

Attention is drawn to the possibility that some of the elements of this document may be

the subject of patent rights. The issuing authority shall not be held responsible for

identifying any or all such patent rights.

This document was proposed by China National Light Industry Council.

This document shall be under the jurisdiction of National Technical Committee on

Visual Acuity of Standardization Administration of China (SAC/TC 596).

The drafting organizations of this document. Zhejiang Weixing Optics Co., Ltd.,

Donghua University, Zhejiang Institute of Metrology Science, Wenzhou Ouhai District

Quality and Technical Supervision and Testing Institute, Haoya (Shanghai) Optics Co.,

Ltd., Jiangsu Kangnaite Optics Co., Ltd., Jiangsu Wanxin Optics Co., Ltd., Yingchang

Uncut finished spectacle lenses -- Part 1.Single-vision and

multifocal

3.1 verification power

The top focal power of the lens calculated and provided by the producer as a reference

value for verification using a refractometer.

NOTE 1.This value is the measured vertex power value provided by the producer.

NOTE 2.The verification power may not necessarily be the same as the power of the order. For

example, due to (visual) physiological effects, the light passing through the lens during measurement

on the focus meter may not be consistent with the wearing position.

NOTE 3.If the producer who has not cut (ground) the edges or assembled the lenses only describes

one power, that power is the order power used for verification.

5.2 Optical performance

5.2.1 Vertex power

Follow the method described in GB 45184.

5.2.2 Column mirror axis direction

Measure according to the method described in GB 45184.

5.2.3 Prism degree and prism degree base orientation

Measure according to the method described in GB 45184.

5.2.4 Change in vertex power of multifocal lenses

The change in vertex power of multifocal lenses is measured according to the method

described in GB 45184.

Unless otherwise declared by the producer, surfaces containing sub lenses should be

selected for measurement.

5.3 Geometric dimensions

5.3.1 Lens sizes

Use measuring instruments with a minimum division value not exceeding 0.1 mm for

measurement.

5.3.2 Thickness

Use measuring instruments with a minimum division value not exceeding 0.05 mm to

measure at the reference point on the front surface of the lens, perpendicular to that

surface.

NOTE. Single focus is the design reference point. Multi focus is the reference point for long-range

use.

5.3.3 Sub lens dimensions of multifocal lenses

Measure on the tangent plane passing through the center of the sub lens using a

projector (optical comparator with ruler) or a measuring instrument with a minimum

division value not exceeding 0.1 mm.

5.4 Material and surface quality

Without the use of optical amplification devices, tests are conducted using the device

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