GB/T 40177-2021
ActiveOptics and optical instruments—Ophthalmology—Graduated dial scale
光学和光学仪器 眼科学 分度盘刻度
Application Summary AI generated
GB/T 40177-2021 specifies the design, graduation, and marking requirements for graduated dial scales used in ophthalmic instruments such as refractors, lensmeters, and phoropters. It ensures consistent and accurate measurement readings for visual acuity testing and prescription determination in clinical and optical laboratory settings. The standard applies to manufacturers and calibration facilities producing or verifying ophthalmic equipment with rotating dials.
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