Service area
Complete and Comprehensive Service in Testing



When driving or doing outdoor activities in the summer, eyeglasses have become the best way to protect your eyes from the harmful effects of the sun.

ETC cooperates with the Bureau of Standards and Testing to establish an optical inspection and measurement system to serve manufacturers.

Sun glasses

Test is based on the following standards

  • CNS 15067

Test Items

  • 280~315 nm light transmittance (UV-B)
  • 315~380 nm light transmittance (UV-A)
  • 380~780 nm visible light transmittance
  • Uniformity of light transmittance for visible light perception
  • Spectral transmittance of 475~650 nm
  • Light signal detection (red, blue, yellow and green) recognition
  • Angle through the plane
  • Polarization efficiency
  • Refractive power (difference in sphericity, astigmatism, prismaticity)
  • Minimum intensity of the filter
  • Construction, filter material and surface quality
  • Eyeglass holder deformation and filter retention
  • Flame resistance
  • Release of Nickel

General Optical Test

Optical test of lenses

  • Filter classification (visible range)
  • Ultraviolet light transmittance
  • Blue light transmittance
  • Optical class

Diopter Test of Lenses

  • 280~315 nm light transmittance (UV-B)
  • Myopia -1 to -15D (i.e. 100 to 1500 diopters)

Other optical test of lenses

  • Lux illuminance test for illuminance meters: illuminance values 0~5000 lux
  • Spectral response test for light detectors Light intensity test for standard light sources: 380 nm~780 nm
Contact lenses

Test is based on the following standards:

  • Filter classification (visible range)
  • "Pre-Clinical Testing Benchmark for Contact Lenses" and ISO 18369-3 and ISO 18369-4

Test items

  • Center thickness
  • Dk : Oxygen permeability
  • Oxygen transmissibility, Dk/t
  • Transmittance