Conformity
Dimensional tolerances
Performance
Flammability
Size
Design
Grades (quality)
Optical properties of materials
Endurance testing
Spectacle frames
Life (durability)
Visual inspection (testing)
Dimensional measurement
Samples
Ophthalmic equipment
Testing conditions
Corrosion tests
Thermal testing
Fire tests
Specimen preparation
Deformation
Artificial ageing tests
Corrosion resistance
Brightness (of colour)
Gas-discharge lamps
Electromagnetic radiation
Dimensional changes
Weight (mass)
Colour
Xenon
Test equipment
Spectacles (eyeglasses)