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Find out more with our Prescription safety glasses FAQ’s

We are often asked the same questions about our prescription safety glasses by each customer. To help you to make your purchase and to answer some of your questions, we have put together this list of Prescription Safety Glasses FAQ’s.

If the questions you have is not here, please email us at [email protected] or use the chat function on the right hand side of the page (Mon – Fri 9 -5pm)


Most frequent questions and answers

Yes our Manufacturing team deals with hundreds of prescriptions every day and have seen various types. If there is a problem or a question that we have we will contact you after you have placed the order to resolve it.

If this questions cannot be resolved, we will provide you with 100% refund.

When you select to buy prescription, using the ‘Select Lenses and Purchase’ You will then need to select the ‘Prescription Lenses’ button on the product page, you will be taken to a section where you will see a box that you can upload an image of your Prescription or fill in your details manually.

Upon your current pair of glasses, look along the arms (temples) and you may see a string of numbers.
These indicate the glasses
Lens Width
Bridge Size
Arm / Temple Length
You can compare our glasses measurements to your existing glasses for sizing and comfort.

Find out What Size Are Your Glasses on our Resource Centre

Safety Protection Glasses can offer discount to our Corporate customers once they open an Account with us. Contact us for further details – [email protected]

If a pair of glasses is marked as EN 166 certified, it is deemed to protect you from hazards that may contribute to damage to your eyes. The EN 166 standard is a broad category that covers several different types beneath it, all covering different elements of protection under its umbrella.

Find out more about What the Standards are for Safety Glasses on our blog.

EN 166 S is a robustness standard and is a specific standard for safety glasses.
EN 166 F is rated for higher levels of protection than S. almost all of our frames and lenses meet this higher standard.

Find our more about What EN166 Means on our blog.

If you are ordering Varifocals you will need to know your Segment Height. This is a measurement specific to whichever frame you are looking to buy. To get the segment height we recommend that you purchase a non-prescription version of the frame you have chosen, take the measurements, and then return the glasses to us for a refund and begin a new order for your new prescription pair with the correct segment height.

You can find our How to Measure Segment Height on our Resource Centre 

Yes we can, make us aware of your requirement in the ‘Additional Notes’ section, or otherwise upload an image of your prescription with the prism values visible.

Digital Single Vision lenses are made using a more modern manufacturing process by which we can reduce the distortion around the edges of your lenses, which is more common in stronger prescriptions over +/- 3 spheres. 

You can find out more on our resource centre – Digital Single Vision Lenses

Yes, we offer a selection of tints viewable when you select the ‘Buy with Prescription’ button. We even offer Transition tints that change depending upon the light.

You can find out more about Lens Colours on our Resource Centre.

If you require any help you can contact us in the bottom right of your screen using the chat bubble (Mon – Fri 9 – 5pm)
Alternatively you can email us at [email protected] and we will get back to you.

You can find out How to Buy Safety Glasses Online on our Resource Centre


+44 2890 994 190 | [email protected]