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www.ChineseStandard.net Database: 189760 (18 Oct 2025)

JJG 1011-2018 English PDF

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JJG 1011-2018: Ophthal mometers
Status: Valid

JJG 1011: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJG 1011-2018	English	419	Add to Cart	4 days [Need to translate]	Ophthal mometers	Valid	JJG 1011-2018
JJG 1011-2006	English	639	Add to Cart	3 days [Need to translate]	Verification Regulation of Ophthalmometers	Obsolete	JJG 1011-2006
JJG 1011-1987	English	RFQ	ASK	3 days [Need to translate]	Terminology and Definitions for Measurement of Force and Hardness	Obsolete	JJG 1011-1987

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Standard similar to JJG 1011-2018

JJG 879 JJF 1106 JJG 810 JJF 2003 JJF 2002 JJF 1912

Basic data

Standard ID	JJG 1011-2018 (JJG1011-2018)
Description (Translated English)	Ophthal mometers
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A60
Word Count Estimation	18,148
Date of Issue	2018-02-27
Date of Implementation	2018-08-27
Older Standard (superseded by this standard)	JJG 1011-2006
Regulation (derived from)	AQSIQ Announcement No. 26 of 2018
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine

JJG 1011-2018: Ophthal mometers

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Corneal curvature test procedure) National Metrology Verification Regulations of the People's Republic Keratometer Ophthalmometers Published on.2018-02-27 2018-08-27 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Keratometer calibration procedure Ophthalmometers Replace JJG 1011-2006 Focal Point. National Medical Metrology Technical Committee Main drafting unit. China Institute of Metrology Participated in the drafting unit. Weihai Metrology Institute This procedure entrusts the National Medical Metrology Technical Committee to explain The main drafters of this procedure. Zhang Jizhen (China Institute of Metrology) Gao Mingliang (China Institute of Metrology) Participate in the drafters. Chen Yan (China Institute of Metrology) Cao Jinxi (Weihai Metrology Institute)

Introduction (II) 1 Scope (1) 2 References (1) 3 terms and units of measurement (1) 3.1 keratometer (1) 3.2 corneal diopter (1) 4 Overview (1) 4.1 Classification (1) 4.2 Measurement principle (1) 5 Metrological performance requirements (2) 5.1 Curvature radius indication error (2) 5.2 Curvature radius measurement repeatability (3) 5.3 corneal diopter indication error (3) 5.4 Axis indication error (3) 6 General technical requirements (3) 6.1 Appearance (3) 6.2 Machine technical requirements (3) 6.3 Measurement capability (3) 7 Measuring instrument control (4) 7.1 Verification conditions (4) 7.2 Verification project (5) 7.3 Verification method (5) 7.4 Processing of verification results (6) 7.5 Verification cycle (7) Appendix A Orthokeratology Record Format (8) Appendix B Cervical curvature test certificate/verification result notice (inside page) format (11)

Introduction

JJF1002 "National Metrology Verification Procedures Writing Rules", JJF1001 "General Measurement Terms and Definitions", JJF1059.1 "Measurement and Representation of Measurement Uncertainty" together constitutes a basic series supporting the revision and revision of this regulation. specification. This procedure is based on the international standard ISO 10343.2014 "Ophthalmicinstruments-Ophthalmome- Based on the ters "Ophthalmology Instruments Keratometry", the JJG 1011-2006 "Cornea Curvage" was revised. of. Compared with JJG 1011-2006, in addition to editorial changes, the main technical changes are as follows. --- Added a description of the content of the introduction; --- In the scope, the description of the requirements and test methods for electrical safety performance has been removed; --- In the reference file, the description of the dated reference file and the non-date reference file are added; ---In the terminology and measurement unit, the keratometer, corneal diopter and keratometer are improved. Terms such as the standard; --- In the overview, a description of the principle of axial curvature measurement of keratometers has been added; ---In the measurement performance requirements, the requirements for the indication error of the axial position are increased; ---In the measurement capability required by the general technical requirements, the requirements for the axial position measurement range and the axial position interval are increased; ---In the verification equipment controlled by the measuring instrument, the description of the axial standard is added; ---In the verification project of measuring instrument control, the verification item of the axial position indication error of the keratometer is added; ---In the verification method of measuring instrument control, the method for verifying the axial position indication error of the keratometer is added. specific description; ---In the processing of the verification results of the measuring instrument control, the error detection of the axial position of the keratometer is added. Relevant content of the result processing; --- Adjust the calibration period of the keratometer to 1 year during the verification period; --- Modified the original record format of the keratometer and the format of the verification certificate, and increased the axial position. Relevant content of indication error verification; --- In the appendix, the "Uncertainty Evaluation of the Measurement Results of the Curvature Radius of the Keratometer" was deleted. content. The previous versions of this procedure are released. ---JJG 1011-2006. Keratometer calibration procedure

1 Scope

This procedure applies to the first verification, subsequent verification and in-use examination of the keratometer. The optometry corneal curvature measurement and axial position measurement can be verified according to this procedure.

2 reference files

This procedure refers to the following documents. ISO 10343.2014 Ophthalmic instrument keratometer (Ophthalmicinstruments-Ophthal- Mometers) For dated references, only the dated version applies to this Code; any undated quotation The latest version (including all amendments) applies to this procedure.

3 terms and units of measure

The following terms and definitions apply to this procedure. 3.1 keratometer ophthalmometer; keratometer An instrument for measuring the radius of curvature of the human cornea, corneal diopter, and axial position. Usually, measuring the center of the cornea area. Note. Part of the keratometer can also measure the area around the cornea and the base curve of the contact lens (the radius of curvature of the optical center of the lens). 3.2 corneal diopter keratometricdioptres; cornealrefractivepower The definition of corneal diopter is as shown in equation (1). F= 337.5 (1) In the formula. F---corneal diopter, m-1; r---the radius of curvature of the anterior surface of the cornea, mm.

4 Overview

4.1 Classification According to the display mode, the keratometer can be divided into two types. continuous display and digital display. The continuous display is a keratometer with a continuous scale; the digital display is to round the measurement to A keratometer with the closest incremental value. The keratometer is mostly based on the measurement principle of visual manual focusing. Some optometry instruments also have a measurement of the radius of curvature of the human cornea or contact lens and the axial position. 4.2 Measurement principle The keratometer is a corneal curvature radius, corneal diopter and axial position measurement using the principle of corneal reflex. of. Here, the keratometer according to the principle of manual manual focusing is taken as an example, and the measurement principle is as shown in FIG. 1 .

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