Eyewear Testing

Eyewear Testing Details

Today let us talk about the eyewear testing benchmark. Normally when we say that our quality frames is in high quality.

But not all people knows how to test it. Eyewear is a broad category that includes everything from spectacles to performance 

eye protectors. Depending on the type and intended purpose, different quality standards may apply to different eyewear, 

but durability and product safety remain important considerations across the board.

Quality and Safety Standards for Eyewear

Frame and mechanical testing:

• Measuring system and Dimensional tolerance
• Dimensional stability at elevated temperature
• Mechanical stability: Bridge deformation and lens retention
• Endurance
• Screw thread and tolerances
• Bridge Strength test
• Frame size and tolerance
• Hinge durability test
• Spring-hinge mechanical test
• Spring pull-out tensile test
• Hinge Strength (inclination bending) test
• Frame material tensile test
• Frame flexibility test
• Coating against bending test
• Compression test (Swimming goggles)
• Sit and Fit
• Thermal stability
• Lateral protection
• Eye coverage and temporal protection
• Field of View
• Lens size, thickness and curvature

Lens and optical testing:

• Optical power (spherical, astigmatic, prismatic power) by telescope 20X (ISO, EN and AS/NZS) and telescope 8X (ANSI and ASTM)
• Ophthalmic lens – refractive properties on single-vision, multifocal and progressive lenses
• Prismatic difference (EN) and prismatic imbalance (ANSI)
• Resolving power (ANSI)
• Optical density
• Luminous transmittance, UV transmittance, blue-light transmittance
• Spectral transmittance and driving lens requirements
• Near Infrared and Infrared transmittance
• Anti-reflection luminous reflectance %
• Scattered light test (light diffusion)
• Wide Angle Scattered light (haze)
• Lens surface and material quality by light-box / grid panel / lens-meter scanning, etc.
• Mounted lens quality – tension and edging quality
• Lens mechanical strength for minimum robustness
• Plane of polarization axis (for polarized lens, uncut and mounted)
• Durability test for anti-abrasion (hard-coating treated) lenses
• Anti-fogging test
• Resistance to fine particles damage

Impact, radiation aging, and flammability testing:

• Drop ball test
• Enhanced robustness
• Increased robustness test
• Penetration test
• High mass test
• High-velocity test
• Resistance to high speed particles (HSP) – low / medium / high energy capacity
• HSP at extreme temperature
• Impact resistance: Low / Medium / High / Extra-High capacity
• Drop test
• Impact test
• Resistance to optical radiation and UV stability (lenses/filters)
• Resistance to radiation (color fastness of frame)
• Resistance to UVA/UVB radiation and water exposure
• Flammability test
• Ignition test
• Permanence test

Impact, radiation aging, and flammability testing:

• Drop ball test
• Enhanced robustness
• Increased robustness test
• Penetration test
• High mass test
• High-velocity test
• Resistance to high speed particles (HSP) – low / medium / high energy capacity
• HSP at extreme temperature
• Impact resistance: Low / Medium / High / Extra-High capacity
• Drop test
• Impact test
• Resistance to optical radiation and UV stability (lenses/filters)
• Resistance to radiation (color fastness of frame)
• Resistance to UVA/UVB radiation and water exposure
• Flammability test
• Ignition test
• Permanence test

Physical and mechanical testing:

• Frame size and major dimensions
• Mechanical stability
• Front deformation
• Lens retention
• Hinge functionality
• Frame color, finish and construction
• Lens color and surface quality
• Frame adjustment and assembling quality
• Frame marking and information