Failure to comply with these requirements will result to removal of the product from the market, leading the manufacturers and importers of sunglasses to potential prosecution.
With such responsibility of the retailers, it is important that they are confident with the ability of their suppliers to address any concerns that the Trading Standards require. Although the interpretation of certain clauses might vary, the supplier can still be able to support their interpretation and prove that due diligence have been expressed. This determines the difference between the product pulled at the Trading Standards request or that remained on shelf.
1. UV Protection
In order to pass the requirements, importers of sunglasses should market eyewear that has minimal UV light lens transmittance across the UVB and UVA bandwidth of 280nm to 380nm wavelength. By complying with this requirement, the consumers will be able to prevent if not eliminate age-related disorders such as cataracts and macular degenerations. The lens absorbs the harmful UV radiation before it reaches the eyes.
2. Uniformity of Lenses
The difference between the luminous transmittance values of the lenses at the optical centres of the left and right eyes should not exceed 20% relative to the higher value. If one lens is darker than the other, the wearer may experience eyestrain, especially when driving.
3. Colour Fidelity
The visual attenuation must not reduce the signal light transmission below the specified limits for blue, green, yellow, and red signal lights. If the lenses do not meet these standards, the wearer will have difficulty identifying the colours, making driving dangerous.
4. Darkness of Lenses
The luminous transmittance of any sun-glare filter is attributed to 5 categories.
0 = 80% to 100% transmittance
1 = 43% to 80%
2 = 18% to 43%
3 = 8% to 18%
4 = 3% to 8%
If the lenses transmit light below 8%, they are too dark for safe driving.
5. Mechanical Properties
Frames and lenses must meet requirements regarding endurance, robustness, and finish to ensure product quality. Poor quality can put the wearer at risk for eye damage.
6. Spherical, Astigmatic, and Prismatic Powers
Optical powers create size variance, positional shift, and shape change. Failure to meet these standards creates optical distortions resulting to eye strain.
These requirements are important and therefore should be complied with in order for you to become an importer. There are a lot more things you should take into accout if you want to import and eventually sunglasses.
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