Our eyes receive and process visual information from the world around us, enabling us to safely navigate our surroundings, identify minute details and read our favourite blogs.
Despite being highly resilient to environmental conditions – like changing light levels and temperatures – the eyes are fragile organs. The cornea, lens and retina are susceptible to damage that can have lasting effects on vision and eye health.
Optical radiation protection
Encompassing light in both the visible and invisible spectrums, optical radiation is necessary to see but too much of certain kinds can be harmful.
Ultraviolet (UV) radiation is emitted by the sun, as well as artificial sources such as UV lamps and arc welding. Excessive exposure to UV radiation causes a photochemical reaction that modifies lens proteins, accelerating the natural breakdown leading to cataracts.
Infrared (IR) light is absorbed by the eye and converted into heat with the potential to cause cataracts and retinal burns. Near-IR is conducted to the lens via the iris which transfers heat to the retina. IR-B and IR-C wavelengths damage the cornea and the eye’s surface tissue.
Visible light also presents a potential hazard. Sunglare reflected on water and other surfaces can distract drivers or machine operators, restricting vision and increasing the risk of accidents.
Eye protection lenses filter different forms of optical radiation. To choose the right type of lens, it is important to consider the optical radiation hazards and visual requirements for the application. Find out more about selecting lenses.
Impact resistance
Debris from power tools, dust, dirt and other airborne particles can all cause serious injuries. In some cases safety spectacles or goggles may provide enough coverage but for applications with significant impact risks we would recommend opting for a faceshield.
The level of impact resistance varies for different product types – safety spectacles are designed to offer low energy impact protection (tested at 45m/s) whereas goggles and faceshields can resist higher energy impacts.
Thermal and chemical resistance
Beyond an injury from the impact itself, hot solid particles can enter the eye and cause burns. Handling molten metal poses a splash risk with the potential to burn the eyes or face. For protection against molten metal and hot solids, look for a ‘9’ marking on the eye protection lens and frame.
Working with chemicals may require tight-fitting goggles to protect the eyes from fumes and aerosols as well as a faceshield to resist liquid splashes.
Visual requirements
Protection against workplace hazards is the first step but, if not carefully selected, the eye protection itself can cause secondary hazards. The wearer must be able to see clearly to work safely.
Good optical performance helps to prevent eyestrain and allows eye protection to be worn comfortably for longer periods. Select a product with ‘1’ marked on the lens – the 1 marking signifies Enhanced Optical Performance (EN ISO 16321-1) or Optical Class 1 (EN 166) which are both suitable for continuous use.
Choosing the right lens shade is key. For example, a darker shade may be needed for outdoor sunglare protection but may not transmit enough light for safe use indoors.
Keeping the lens clean and free from scratches preserves optical performance and makes your eye protection last longer. Lenses with anti-scratch/anti-mist lens coatings are more resistant to surface damage and help to prevent fogging for uninterrupted clear vision.
Prescription compatibility
Staff who wear prescription (Rx) glasses need compatible eye protection. A good fit is important to achieve the right visual correction and ensure the eye protection can perform properly.
Prescription-compatible eye protection options:
- Overspectacles & faceshields are designed to fit over prescription glasses.
- RX inserts are used to mount corrective lenses inside safety goggles and full face respirators.
- Prescription safety spectacles combine the corrective and protective properties into one lens, often custom-made to the wearer’s prescription.
Find out more about prescription compatible eye protection.
We rely on vision for so much. With many common workplace hazards putting it at risk, selecting the right eye protection is crucial. It is important to choose the appropriate performance properties – making sure the wearer is fully protected, able to see clearly in their relevant work areas, and integrate prescription lenses if required. Visit the new Ask JSP website for more information about eye protection.
Find out how to make sure your eye protection fits
Learn more about eye protection compatibility