1 Scope
This standard specifies the optical and mechanical requirements and test methods for optical devices for enhancing low vision.
This standard is applicable to optical devices specified by the manufacturer for use by visually impaired persons as optical low-vision aids as well as optical devices with electrical components (such as illuminators).
This standard does not apply to electro-optical devices for enhancing low vision.
Note: Requirements and test methods for electro-optical devices for enhancing low vision are specified in other standards.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest editions of the normative documents referred to applies.
GB/T 14214 Spectacle Frames - General Requirements and Test Methods
GB/T 16886.1 Biological Evaluation of Medical Devices - Part 1: Evaluation and Testing (GB/T 16886.1-2001, idt ISO 10993-1: 1997)
ISO 14889 Ophthalmic Optics - Spectacle Lenses - Fundamental Requirements for Uncut Finished Lenses
ISO 14490-5 Optics and Optical Instruments - Test Methods for Telescopic Systems - Part 5: Test Methods for Transmittance
ISO 15004 Ophthalmic Instruments - Fundamental Requirements and Test Methods
3 Terms and Definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
astronomical telescope
Keplerian telescope
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification
5 Requirements
6 Environmental Conditions of Use
7 Test Methods
8 Marking and Instructions for Use
Annex A (Informative) Determination of Lateral Variation of Magnification
1 Scope
This standard specifies the optical and mechanical requirements and test methods for optical devices for enhancing low vision.
This standard is applicable to optical devices specified by the manufacturer for use by visually impaired persons as optical low-vision aids as well as optical devices with electrical components (such as illuminators).
This standard does not apply to electro-optical devices for enhancing low vision.
Note: Requirements and test methods for electro-optical devices for enhancing low vision are specified in other standards.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest editions of the normative documents referred to applies.
GB/T 14214 Spectacle Frames - General Requirements and Test Methods
GB/T 16886.1 Biological Evaluation of Medical Devices - Part 1: Evaluation and Testing (GB/T 16886.1-2001, idt ISO 10993-1: 1997)
ISO 14889 Ophthalmic Optics - Spectacle Lenses - Fundamental Requirements for Uncut Finished Lenses
ISO 14490-5 Optics and Optical Instruments - Test Methods for Telescopic Systems - Part 5: Test Methods for Transmittance
ISO 15004 Ophthalmic Instruments - Fundamental Requirements and Test Methods
3 Terms and Definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
astronomical telescope
Keplerian telescope
Contents of GB 23719-2009
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification
5 Requirements
6 Environmental Conditions of Use
7 Test Methods
8 Marking and Instructions for Use
Annex A (Informative) Determination of Lateral Variation of Magnification
