Don’t let smoke into your eyes or foreign objects.
At least smoke has dissipated from recent Tathra fires.
Some frame and lens materials have better heat resistance and antifogging properties than others. Fire grade positive seals of protective eyewear in cases of recent Tathra fires would have been ideal in reducing eye inflammation from smoke as would correct masks and respirators.
Should safety eyewear fog up under hot or steamy conditions, and removed exposure to a possible variety of hazards can ensue.
Sixty per cent of all eye injuries happen in the workplace ,so every workplace, regardless of industry, should have eye safety procedures. Many people need education in this regard.
Gamma rays, X-rays, and high ultraviolet radiation can be a health hazard as it penetrates the body and will transmit through spectacle glasses though it will appear denser than soft tissues. This ionising radiation can cause cell damage ( from spectroscopy studies) as opposed to the nonionising radiation of visible light wavelengths and lower .
The longer wavelength and lower energy microwaves and radio waves will penetrate the body with some absorption. The eyes are one of the most sensitive organs in the body for microwaves. The microwaves excite the water molecules in the body and cause heat damage effects at high levels.
Special shielding similar to faraday cages is required to block this kind of radiation, glasses do not prevent transmission
All standards for electromagnetic radiation transmitting equipment, including those emitting microwave radiation, set safe limits, which are much below what will cause damage to the body.
Though the sun emits all of the different kinds of electromagnetic radiation, 99% of its rays are in the form of visible light, ultraviolet rays, and infrared rays (also known as heat).
Type of Hazard
High speed particle
Impact resistant lens (Polycarbonate); Lens coverage / size; side shields; Impact resistant frame or face shield; Lens stability and bevel profile.
Impact resistant lens; Lens coverage; impact resistant frame or protective google; Lens stability.
Sealed goggle, ventilation and fogging; Scratch resistant protection front and back lens surface.
Radiation (including UV) & Heat
Non-conducting frame; radiation protection and face shield; visible light control (welding); lens stability in frame; coating stability.
Chemical or biological spatter
Sealed goggle, ventilation and fogging; Ease of decontamination
Eye injuries in the workplace are most commonly caused by grinding and welding, usually in the fishing, construction, manufacturing, agriculture, forestry and mining industries .
Whilst Solar UVC is absorbed by the atmosphere, artificial sources of UVC may still be present.
Depending on the properties of the material different wavelengths of UV and visible radiation will either transmit through the lens or be blocked or reflected. This is the case for UVC, UVB and UVA. Not all contact lenses will block UV transmission, just as not all prescription lenses block UV.
Occular absorption depends on the wavelengths and the age of the eye.
Sunglasses sold in Australia are not permitted to transmit UVB greater the 0.05% of total transmission, and, no more than 0.5% of total transmission of UVA, even less if the glasses are a category 4 sunglass. Because sunglasses are designed to protect against the sun and there is no UVC at ground level, UVC is not required to be tested. Occupational lenses need to be tested The Australian/New Zealand Standard AS/NZS 1338.1:2012 Filters for eye protectors – Filters for protection against radiation generated in welding and allied operations and AS/NZS 1338.2:2012 Filters for eye protectors – Filters for protection against ultraviolet radiation regulates eye protection in the workplace for occupations both indoors and outdoors where artificial UV radiation may reach potentially hazardous levels.
Safety glasses allow air around the eye area as opposed to a seal against the face, to avoid dust and splashes.
Face shields provide further protection and can also be worn over the safety eywear
AS/NZS 1336: Recommended practices in occupational eye protection
Section 4 deals with the use of personal eye protectors in industrial settings and gives examples of specific hazards together with recommended eye protection.
Section 7 deals with prescription eye protectors.
AS/NZS 1337: Occupational eye and face protection
This Standard sets down the requirements for non-prescription eye protection.
There are four critical elements in compliant prescription eyewear.
1.) Appropriate frame
2.) Appropriate lens material and thickness
3.) Appropriate fitting
4.) Labelling and assuring compliance
The interior water vapor condenses onto a single lens because the lens is colder than the vapor, although anti-fog agents can be used.
Antifogging eywear generally have two layers of airtight lenses (innner lens warmer outer lens colder) to prevent the interior from becoming “foggy” by keeping the temperature of the inner lens close to that of the interior water vapour
Ventilation safety glasses can prevent sweat from building up inside.
Fogging is the number one vision-related barrier to wearing safety eyewear.
SAI global certified anti-fog coatings are now available.
Handy belt cases can have them at the ready,so you not caught out.
Clip-ons Attached to a prescription spectacle or plano-lens frame,normally when glare is the only risk.
Overglasses Need to have correct fit/instability.
Wide vision Safety glasses – often resembling sunglasses. Additions such as frame collars provide peripheral protection.
Inserts – Eye protectors with a prescription carrier.
Wide vision goggles – Flexible frame or rigid with a separate cushioned fitting surface and headband.
Welding goggles – added protective measures for welding with air vents and anti-fog coatings.
Face shields can provide additional protection against extreme temperatures to the face, blasts and high impact
Smoke being a mixture of chemicals in gaseous, liquid and solid forms contains different-sized smoke particles .
Smoking tobacco is detrimental as is smoke in your eyes.
Generally eye irritation from smoke can be relieved by flushing with artificial tears and the use of a cold compresses depending upon the circumstances.
Prescription safety eyewear allows
• Increased comfort,improved vision
• Reduced weight.more fashionable
• Less reflection, Less restriction on movement and visual field