How to Choose the Right Safety Glasses & Eye Protection – A Practical Buyer’s Guide

Your eyes are particularly vulnerable in the workplace. A tiny flying particle, fragment, splash or chemical can potentially cause a serious eye injury.

But choosing eye protection isn't simply a case of picking up any pair of safety glasses.

Safety spectacles, goggles and face protection are designed for different hazards, and understanding their standards, markings and features can help you choose the right protection for the job.

This practical guide covers some of the most important things to consider when buying workplace eye protection.

1. Start With the Hazard

Before choosing eye protection, start by asking:

What are we protecting the wearer from?

Common workplace eye hazards can include:

• Flying particles and debris
• Dust
• Metal fragments
• Wood chips
• Liquid splashes
• Chemicals
• Molten material
• UV and other optical radiation
• High-speed particles
• Sparks and hot particles

The protection required by somebody drilling into concrete may be very different from that needed by somebody handling chemicals.

Start with the risk assessment, identify the hazard and then choose the appropriate eye protection.

2. Safety Glasses or Safety Goggles?

One of the first decisions is whether you need safety spectacles or goggles.

They might appear to do a similar job, but the level and type of protection they can provide can be very different.

Safety Glasses & Spectacles

Safety spectacles look similar to ordinary glasses but are specifically designed and tested to provide workplace eye protection.

Depending on their design and rating, they can be an excellent choice for general protection against hazards such as flying particles.

Useful features to consider include:

• Side protection
• Wraparound lenses
• Adjustable arms
• Anti-scratch coatings
• Anti-fog properties
• Lightweight frames
• Comfortable nose bridges
• Compatibility with other PPE

For many everyday industrial applications, a good pair of safety spectacles can provide an excellent balance between protection, comfort and visibility.

If spectacles are appropriate for your workplace risk assessment, you can browse our full range of Safety Spectacles here.

Safety Goggles

Safety goggles provide greater enclosure around the eyes than ordinary safety spectacles.

This can make suitable goggles more appropriate where the risk assessment identifies hazards such as dust, droplets or liquid splash.

Goggles may be:

• Directly ventilated
• Indirectly ventilated
• Non-ventilated

The ventilation design is important because it can affect both wearer comfort and the types of hazards the goggles are suitable for.

For example, a highly ventilated goggle might be comfortable in some working environments but unsuitable for a particular splash or fine-particle hazard.

Always check the individual product specification rather than choosing purely on appearance.

Where greater enclosure around the eyes is required, browse our range of Safety Goggles here.

3. What Does EN 166 Mean?

EN 166 is one of the standards you'll commonly encounter when looking at safety eyewear already in use in UK workplaces.

It covers personal eye protection and includes requirements relating to areas such as optical and mechanical performance.

However, PPE standards evolve.

You may increasingly encounter products certified against the newer EN ISO 16321 series for occupational eye and face protection.

This means that two suitable products may display different standard references depending on when and how they were certified.

Buying Tip: Don't choose or reject eye protection based purely on one standard number. Check the manufacturer's declaration, the applicable standard and, most importantly, whether the product's tested performance is appropriate for the hazard.

4. Understanding the Markings on Safety Glasses

Those small letters and numbers printed or moulded into safety eyewear aren't there for decoration.

They can provide important information about the protection offered by the product.

Depending on the applicable standard and product, markings can identify information such as:

• Manufacturer
• Optical performance
• Mechanical strength
• Field of use
• Lens properties
• Filter performance
• Additional protective characteristics

This is why two pairs of clear safety glasses that look almost identical can have quite different specifications.

Never assume appearance equals performance.

5. Impact Protection – What Do the Letters Mean?

On products marked to EN 166, you may encounter mechanical strength markings such as:

S – Increased robustness

F – Low-energy impact

B – Medium-energy impact

A – High-energy impact

The type of eye protector matters because not every style of eyewear can achieve every impact classification.

Safety spectacles, goggles and face shields provide different levels of coverage and can be suitable for different applications.

Choose according to the hazard and required performance, rather than simply looking for the highest letter.

6. What Does the Optical Class Mean?

On EN 166-marked eyewear, you may also encounter an optical class.

These are traditionally identified as:

1 – Suitable for continuous wear

2 – Suitable for intermittent use

3 – Suitable for occasional use

For employees expected to wear safety eyewear throughout their working day, optical quality becomes particularly important.

Poorly chosen eyewear that causes discomfort or interferes with vision is less likely to be worn consistently.

7. Clear, Smoke, Yellow or Other Lenses?

Safety glasses are available with a variety of lens colours, and the choice isn't purely cosmetic.

Clear Lenses

Clear lenses are the standard choice for many indoor and general workplace applications where eye protection is required without intentionally reducing visible light.

Smoke or Tinted Lenses

Suitable tinted safety eyewear can be useful for outdoor work and bright conditions where its specification matches the application.

Yellow or Amber Lenses

Yellow or amber lenses are often marketed for improving perceived contrast in certain lower-light environments.

As with all safety eyewear, suitability should be assessed for the actual task and working conditions.

Specialist Lenses

Work involving welding, optical radiation or other specialist hazards can require dedicated filters and specialist eye protection.

Never assume ordinary tinted safety glasses provide suitable protection against a specialist optical hazard.

8. Anti-Fog Protection Can Make a Big Difference

Fogging is one of the most common complaints associated with safety eyewear.

It can become particularly noticeable when moving between different temperatures or when safety glasses are worn with other PPE such as:

• Respirators
• Face coverings
• Safety helmets
• Face shields

If workers regularly remove their glasses because they keep steaming up, the protection isn't doing its job.

For these environments, consider eyewear specifically designed or treated for fog resistance.

When comparing products in our Safety Spectacles range, check the individual specifications for features such as anti-fog and lens coatings.

9. Don't Forget Scratch Resistance

Safety glasses can have a tough life.

They get placed on workbenches, carried in pockets, dropped into toolboxes and cleaned repeatedly.

A badly scratched lens can interfere with vision and make workers less likely to wear their eye protection.

Look for appropriate resistance to surface damage where this is important for the application, and consider providing suitable storage.

A simple protective case or pouch can help keep eyewear in good condition for longer.

10. Can I Wear Safety Glasses Over Prescription Glasses?

If somebody needs prescription glasses to work safely, simply removing them and replacing them with standard safety glasses isn't a suitable solution.

There are several options.

Over-Spectacles

Over-spectacles are specifically designed to fit over existing prescription glasses.

They can provide a simple solution for visitors, occasional users and other situations where dedicated prescription safety eyewear may not be required.

Prescription Safety Glasses

For employees regularly requiring both vision correction and eye protection, properly specified prescription safety eyewear can provide a more comfortable long-term solution.

Whatever option is chosen, make sure the complete arrangement provides the protection required by the workplace risk assessment.

11. What About Contact Lenses?

Wearing contact lenses doesn't remove the need for appropriate workplace eye protection.

If the risk assessment requires safety spectacles or goggles, the wearer still needs appropriate PPE.

Specific working environments may introduce additional considerations, so these should be addressed through the workplace risk assessment and appropriate occupational guidance.

12. Safety Glasses and Face Shields Aren't the Same Thing

A face shield provides broader coverage of the face, but this doesn't automatically mean it replaces safety spectacles or goggles.

For some hazards, the correct solution may be:

SAFETY GLASSES / GOGGLES + FACE SHIELD

rather than one or the other.

Where a risk assessment identifies significant splash, impact or other hazards, multiple forms of protection may be necessary.

Always check the specification of the equipment and the requirements of the task.

13. Make Sure Your PPE Works Together

Eye protection is rarely worn in isolation.

A worker might simultaneously be wearing:

• Safety helmet
• Ear defenders
• Respirator
• Safety glasses
• Face shield
• Hi-vis clothing

Each item might work perfectly well on its own but become uncomfortable or potentially interfere with another item when worn together.

Helmet straps can interfere with spectacle arms. Respirators can contribute to lenses fogging. Goggles can affect the fit of other PPE.

Think about PPE as a complete system.

If your workforce regularly wears several items of PPE together, test the combination before placing a large order.

14. Comfort Matters More Than You Might Think

The safest pair of glasses sitting in the cupboard isn't protecting anybody.

For eyewear that will be worn for long periods, consider:

• Weight
• Nose bridge comfort
• Temple pressure
• Adjustability
• Lens size
• Field of vision
• Ventilation
• Compatibility with other PPE

A small increase in purchase price can be worthwhile if it results in eyewear employees are comfortable wearing throughout their shift.

15. One Size Doesn't Always Fit Everyone

Faces vary considerably.

A pair of glasses that fits one employee perfectly might sit too wide, too narrow, too high or too low on somebody else.

If you're purchasing large quantities of safety eyewear for a workforce, consider testing a few models first.

You may find that providing more than one approved style gives employees a better chance of achieving a secure and comfortable fit.

16. Look After Your Safety Eyewear

Safety glasses and goggles should be inspected and maintained in accordance with the manufacturer's instructions.

Regularly check for:

• Cracked lenses
• Deep scratches
• Damaged frames
• Loose components
• Damaged straps
• Deteriorated seals
• Contamination
• Poor visibility

Dirty eyewear should be cleaned using a method appropriate for the product.

If eyewear is damaged to the point where its protection, fit or visibility may be compromised, it should be replaced.

17. Cheap Safety Glasses or Premium?

There is nothing inherently wrong with inexpensive safety eyewear provided it offers the appropriate certified performance for the task.

For short-duration or visitor use, a straightforward pair of suitable compliant spectacles may be perfectly adequate.

For somebody wearing eye protection every working day, however, additional features can be worth paying for.

Better fit + lower weight + optical quality + anti-fog + scratch resistance + improved comfort

Think about cost per wear, not simply cost per pair.

Eye Protection Ordering Checklist

• What is the eye hazard?
• Do we need spectacles, goggles or additional face protection?
• Which standard applies?
• What impact or other performance level is required?
• Are clear, tinted or specialist lenses needed?
• Is anti-fog performance important?
• Will employees wear the eyewear continuously?
• Does anyone need prescription-compatible protection?
• Will it be worn with helmets, respirators or hearing protection?
• Have we checked comfort and fit?
• How will the eyewear be cleaned, stored, inspected and replaced?

Ready to Choose Your Eye Protection?

Don't start by asking "Which safety glasses are cheapest?"

Instead, start with:

HAZARD → TYPE → STANDARD → PERFORMANCE → FIT → COMFORT → COMPATIBILITY

Two pairs of safety glasses can look almost identical while offering different levels and types of protection.

Understanding what you're protecting against – and then checking the markings and product specification – makes choosing appropriate eye protection much easier.

When you're ready to order, shop our range of Safety Spectacles or browse our Safety Goggles to compare the different options available.

And, as with all PPE, remember that eye protection is the last line of defence. Workplace hazards should be eliminated or appropriately controlled wherever reasonably practicable before relying on PPE.

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