What are the domestic and international EMC (electromagnetic compatibility) standards for optometers?

Refractometers (automatic refractometers, comprehensive refractometers) must meet GB 9706.1, YY 0505 (domestic), and IEC 60601-1-2 (international) EMC standards. Automatic refractometers automatically measure refractive power using an infrared light source, target pattern projection, and photoelectric detection system. They include precision optical components and servo motors (for lens adjustment). The standards require that the stability of the optical measurement system and the accuracy of servo positioning be unaffected by the device's own drive circuitry and environmental electromagnetic noise, ensuring the accuracy and repeatability of the refraction results.