safetyspecs.co.uk

23/02/2026

Polycarbonate (EN166F) safety lens material is ideal for impact resistance, repelling projectiles propelled its surface and adequately protecting its wearer from ocular injury.

Note however: it does have a significant 'Achilles Heel'.

If in the course of working, any hydrocarbon liquid (i.e. solvents, thinners or oils) which accidentally splash or are wiped on the lens, gaining access to the rim of the spectacle frame, can in a very short time, break the molecular bonds of this normally strong polymer at its edge and render it totally useless and requiring replacement.
Imagine this happening in the first few weeks of wearing your newly purchased prescription safety glasses.

See the following actual examples of characteristic radial cracks in polycarbonate prescription lenses, starting small and becoming bigger....

THE SOLUTION IS TRIVEX LENS MATERIAL - it's as shatterproof as Polycarbonate (EN166F) in its ballistic tests but will withstand even the harshest solvents such as acetone or toluene, fuels, grease, Hydraulic fluid, lubricating fluids, thinners, oils, disinfecting wipes used in medicine and even some alcohol based spectacle lens cleaners.

If during the course of your work there is any risk you could come into contact with any of these listed above, choosing TRIVEX lens material for your safety glasses could prolong the life of your protective spectacles considerably.

Note: TRIVEX lens material is only currently available in Riley and Bolle prescription safety spectacle ranges. See those models here... https://www.safetyspecs.co.uk/select-by-lens-material/trivex

16/11/2025

Check your lens markings if you are in the UK or Europe (Look for the last letter engraved on the lens for S or F) and make sure you are fully protected for the purpose they will be used for.

Tag a workmate to check theirs too.

This video is a graphic example courtesy of UVEX showing the difference between impact categories and why they need to be appropriate to the task you are performing....

EN166 S - Standard Plastic (CR39) and Toughened ('Safety') Glass and
EN166 F - Polycarbonate and Trivex (not shown) lens materials.

https://youtu.be/E_xagKOwm-8

www.safetyspecs.co.uk
Prescription safety glasses, purchase online

Check your lens markings if you are in the UK or Europe (Look for the last letter engraved on the lens for S or F) and make sure you are fully protected for ...

14/08/2023

Find the Brand New RILEY CYPHER prescription, wrap around safety frame available to purchase conveniently, online in single focus, bifocal & varifocal lenses, in shatterproof EN166F polycarbonate or EN166S standard plastic with tint or photochromic options at https://www.safetyspecs.co.uk/view-safety-frames/items-for-sale/riley-cypher-prescription-safety-glasses

07/06/2023

View the brand new B714 ladies prescription safety frame at... https://www.safetyspecs.co.uk/view-safety-frames/items-for-sale/bolle-b714-prescription-safety-glasses
Share with a spectacle wearer you know who also needs eye protection.

08/03/2023

New from MCR Safety - Model: Altitude
A modern take on a traditional design, all the classic style yet lightweight and super-soft.
Available in single focus, bifocal and varifocal lens types made exactly to your prescription.

BS EN166F Certified, CE marked Modern take on a contemporary shape Plastic frame with integral semi transparent side shields Inset into the bridge are ribbed rubber pads to prevent slipping 2 ye...

05/01/2023

'Everyday' spectacles simply aren't protective spectacles and it just takes a split second for a catastrophic impact from a fast moving, low mass, flying particle to find that out.
Protect your eyes properly at work or at play with EN166 F rated prescription safety glasses. Available to conveniently order online and delivered direct to your door from all of the UK's certified safety spectacle manufacturers. In single vision, bifocal and varifocal lenses with a wide range of tints and coatings.
Your eyes are so precious and the NHS are busy enough!

safetyspecs.co.uk

25/04/2022

Brand new to us... the stylish UNIVET 'Contemporary' prescription safety frame. Available in a wide range of prescriptions in single focus, bifocal and varifocal EN166 safety lenses. With optional blue blocking anti-reflection coating for visual comfort if using computer screens or electronic devices.
Now available to order at safetyspecs.co.uk
See promo video at... https://youtu.be/j7Mi-eckKPc

BS EN 166F Certified, CE marked Acetate unisex frame material in a contemporary style Available in 3 colours and three sizes for all face sizes Metal free / Screwless Integral side shielding ...

14/02/2022

Spectacle wearers who are PayPal account holders can now spread the cost of their Prescription Protective Eyewear over 3 instalments.
Once you have specified the pair that you want, simply click the 'Pay later' PayPal button in 'Order Summary', log into your account and PayPal will arrange to take take 1/3 payment straight away followed by 2 instalments, 1 month and 2 months later.
Access to the UK's biggest brands and huge choice of EN166 prescription safety eyewear is more affordable than ever.

safetyspecs.co.uk

19/12/2021

We are pleased to announce two brand new frames to add to our already extensive range of prescription safety glasses, EN166 certified and ready for the New Year from Riley and UVEX !

These new models, plus many more, are available to purchase right now at safetyspecs.co.uk.

Protecting your precious eyes isn't a bad New Years resolution if you haven't thought of one already - Regular spectacles are not shatterproof and don't protect from side impact

Stay safe and cover them appropriately whilst working in harms way.

12/07/2021

Only trust your varifocal safety glasses to an online provider who doesn't just guess your pupil position behind the frame.
e-dispensing from safetyspecs.co.uk ensures an accurate, perfectly centered lens using an image of you wearing a sample of the frame with one of our calibration ruler in shot, which we send out as soon as your varifocal order is placed with us.
This way, you can try the frame of choice first, check the fit & suitability and be confident when they arrive, your vision with be absolutely spot on.

(software screenshot)

safetyspecs.co.uk

05/04/2021

Bolle safety have introduced three NEW prescription safety frames for 2021.
All three models are also now available in TRIVEX lens material in single vision, bifocal and varifocal lens types. It is chemical resistant and shatterproof meeting the EN166 F impact resistance standard. TRIVEX is recommended where solvent/oil contact or splashes are a potential or likely occurrence in everyday use.
See the entire UK/EU Bolle range including these new models at... https://www.safetyspecs.co.uk/select-by-brand/bolle