Lens Lab Test
Short version: every Auresta frame uses the same orange lens. It has been lab-tested to BS EN ISO 12312-1:2013+A1:2015. It lets through 1.01% of blue light across 380–500 nm, which means it filters 99%. It lets through 0.00% of UV at 380, 390 and 400 nm (UV400). Its luminous transmittance is 47.05%, so it is filter category 1. It is not suitable for driving. The full readout is below.
What was measured
| Measurement | Result | What it means |
|---|---|---|
| Blue light transmittance, 380–500 nm | 1.01% | 99% of blue light in that band does not reach your eye. |
| UV transmittance at 380, 390 and 400 nm | 0.00% | UV400: the lens blocks UV up to 400 nm. |
| Luminous transmittance (Tv) | 47.05% | About half of visible light passes. That is why the world looks warmer and slightly dimmer. |
| Filter category | 1 | A light tint. These are not sunglasses for bright sun. |
| Blue signal light recognition (Q) | 0.34 (the standard requires ≥ 0.6 for road use) | Blue traffic signals look too dim through an orange lens. Do not drive in them. |
| Coating | Nine-layer anti-reflective | Cuts the reflections of your monitor and room lights on the lens. |
| Prescription | None (plano) | There is no optical power. You can wear them over contact lenses. |
Why we publish the numbers
"Blocks blue light" can mean anything. A clear lens with a coating might reflect a small share of blue light. An orange lens absorbs almost all of it, which is the reason it looks orange. Without a percentage and a wavelength range, the claim tells you nothing. So we give you both, plus the figures that tell against us, such as the driving result.
What these numbers do not prove
A spectrometer measures the lens. It cannot tell you whether you will sleep better or get fewer headaches. A 2023 Cochrane review of 17 randomised trials found that blue-light-filtering lenses probably make little or no difference to eye strain from screens. It also found the evidence on sleep too uncertain to draw a conclusion. We sell a lens that measurably filters blue light, cuts glare and warms the screen. We do not sell a cure. You can read more in Blue light glasses for sleep: do they actually work?
Frame facts
- Material: TR90, a flexible memory polymer used in sports eyewear. It bends instead of snapping.
- Weight: 19 g.
- Arms: slim and straight, so they pass under a headset cup.
- Shapes: square, round and panto, in nine colourways.
Questions
Is every frame fitted with the same lens?
Yes. All nine frames use the same orange lens and coating, so the results above apply to every pair.
Can I wear them for photo editing or colour work?
No. Take them off for colour-critical work. Whites turn golden and blues are muted, and that is the filtering you can see.
Are they safe to wear outdoors?
They block UV400, but at filter category 1 they are not sunglasses. Never wear them to drive.