October 30th, 0 Comments. Claim your Optical Extras benefit for your prescription safety glasses before the end of the year. October 10th, 0 Comments. Anti-Fog Coatings. September 25th, 0 Comments. Suffer from dry eyes? What can you do? July 16th, 0 Comments. July 5th, 0 Comments. Leave A Comment Cancel reply You must be logged in to post a comment. Choose currency. Go to Top. Lens fogging is caused by water vapor condensation. This condensation occurs when water vapor from your sweat, breath, and ambient humidity lands on the cold surface of your lenses.
The vapor cools and changes into tiny drops of liquid, forming a film that you see as fog. Changes in relative humidity, temperature, and physical activity will affect how quickly your lenses fog up.
Your physical activity can also increase the likelihood of fogging due to your sweat, increasing the amount of humidity in proximity to your lenses.
Most anti-fog lenses use anti-fogging agents, which are chemicals that prevent water condensation in small droplets. The treatments work by minimizing surface tension, resulting in a non-scattering film of water instead of single droplets. The length of the delay depends on the quality of the anti-fog treatment and environmental conditions. Fortunately, there are plenty of options available for anti-fog safety glasses , goggles , and sunglasses.
Many brands offer eyewear styles with anti-fog lens options for all budget levels. Keep in mind, the better performing anti-fog treatments typically cost more. Take the time to evaluate your environment and situation before making a purchase. A mild climate may allow you to use a basic anti-fog lens and save some of your hard-earned money. Condensation on eyewear lenses occurs naturally because of temperature variances - in winter especially - but a premium anti-fog coating will usually provide clear visibility through a lens for more than 3 minutes an average lens will fog up after about two seconds.
An important indicator of premium performance by a lens is the properties of the anti-fog coating. When choosing eyewear, look for an anti-fog coating that is both hydrophobic repels moisture, making it bead and run off the lens, providing the user with a clearer field of view , and hydrophilic attracts moisture and forms a thin coating of water over the lens.
This can also reduce the scattering of light and allowing the wearer to see more clearly. The more comfortable, stylish, and adjustable the eyewear, the better the chances that a worker will keep his or her safety glasses on - avoiding injury, and staying compliant with safety regulations.
None of this matters however if the glasses are removed due to fogging. Fogging is the number one issue with safety eyewear, as cited by users.
The tighter the safety eyewear fits, the more susceptible it is to fogging. In an ongoing effort to combat this issue, Radians has created an anti-fog lens coating that not only provides superior and longest-lasting anti-fog properties at a competitive price, but also provides an anti-scratch coating that lasts longer than hydrophobic coatings.
Premium Solvent-Based Anti-Fog. Corrosive to Polycarbonate. May require thicker lens to meet impact resistance requirements. Friendly to Polycarbonate. Does not affect material strength. Good Inherent scratch resistance: grams Steel Wool Test. Best Inherent scratch resistance: grams Steel Wool Test. Shelf Life- 24 months or longer.
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