Overview
ISO 10342:2010 is an international standard developed by the International Organization for Standardization (ISO) that specifies technical requirements and test methods for eye refractometers-ophthalmic instruments used to measure the refractive errors of the eye using an objective measuring principle. This standard focuses specifically on the measurement of spherocylindrical refractive errors, including spherical and cylindrical vertex power and axis orientation.
The document ensures that eye refractometers meet reliable performance criteria and provides clarity on calibration, testing, and marking requirements for manufacturers and users. ISO 10342:2010 complements and, where discrepancies arise, takes precedence over ISO 15004-1, which covers general ophthalmic instrument standards.
Key Topics
- Measurement Scope: Targets spherocylindrical refractive error measurement, critical for diagnosing myopia, hyperopia, and astigmatism.
- Optical and Accuracy Requirements:
- Measuring range for spherical vertex power: −15 D to +15 D.
- Measuring range for cylindrical power: 0 D to 6 D.
- Cylinder axis range: 0° to 180°.
- Accuracy tolerances differ based on instrument type (digital or continuous reading) for power and axis.
- Test Methods:
- Type tests conducted using a specialized optical test device with high precision.
- Verification of spherical vertex power across multiple measurement points from −15 D to +15 D.
- Cylinder axis accuracy tested at principal meridians ensuring axis and power remain within defined tolerance.
- Eyepiece Adjustment: If applicable, the operator's eyepiece must support dioptric adjustments within −4 D to +4 D.
- Accompanying Documentation:
- Clear user instructions.
- Manufacturer’s details and calibration verification procedures.
- Guidelines for disinfection and transport conditions.
- Marking and Traceability:
- Mandatory permanent markings include manufacturer info, model, standard reference, and reference wavelength.
- Test Device Specifications:
- Optical glass used with precise parameters such as Abbe number (58–60).
- Designed to simulate human eye characteristics for reliable calibration.
Applications
ISO 10342:2010 is essential for manufacturers, distributors, clinicians, and calibration laboratories involved in the design, production, and maintenance of eye refractometers. These instruments are widely used in:
- Optometry and ophthalmology clinics for objective refraction and early diagnosis of vision anomalies.
- Clinical trials and research requiring standardized measurement methods.
- Quality control and certification of ophthalmic devices ensuring compliance with international safety and performance benchmarks.
- Calibration services utilizing the defined test methods and devices to verify instrument accuracy and reliability.
By adhering to ISO 10342:2010, users can expect consistent, accurate refractive error measurements that form the basis of appropriate visual correction prescriptions and improved patient care.
Related Standards
- ISO 15004-1:2006 - Ophthalmic instruments-Fundamental requirements and test methods applicable to all ophthalmic devices.
- ISO 7944 - Reference wavelengths for optics and optical instruments.
- ISO 8429 - Graduated dial scales in ophthalmology.
- ISO 13666 - Vocabulary related to spectacle lenses.
- IEC 60601-1:2005 - Medical electrical equipment-General safety and essential performance requirements.
These standards work together with ISO 10342:2010 to ensure comprehensive regulation of ophthalmic instruments, from fundamental safety to precise measurement protocols.
Keywords: ISO 10342:2010, eye refractometers, ophthalmic instruments, refractive error, spherocylindrical measurement, optical standards, eye examination equipment, refractive power accuracy, cylinder axis, medical device calibration, ophthalmic test methods.
