Lens coatings can enhance the performance and look of your spectacles lenses. If you are considering buying brand-new eyeglasses, here are lens finishings and treatments you need to think about.
Anti-reflective coating (also called AR coating or anti-glare coating) is a microscopically thin multilayer coating that removes reflections from the front and back surface area of spectacles lenses.
By doing so, AR coating makes your lenses almost invisible so people can concentrate on your eyes, not sidetracking reflections from your glasses.
Anti-reflective coating also removes glare brought on by light reflecting from your lenses. With reflections removed, lenses with AR coating supply much better vision for night driving and more comfortable vision for reading and computer use.
AR coating is extremely advised for all eyeglass lenses, but particularly for polycarbonate and high-index lenses, which show more light than routine glass or plastic lenses if anti-reflective coating is not used.
Also, aspheric lenses, which have flatter curves than regular lenses, frequently cause more noticeable reflections, so AR coating is extremely advised for these lenses, too. And AR coating is beneficial when used to the back surface area of sunglasses to eliminate “bounce-back” reflections when you are dealing with far from the sun.
For the very best possible comfort in all lighting conditions, many eye care specialists recommend applying anti-reflective coating to photochromic lenses. AR coating improves light transmission through the lenses for night owning and assists photochromic lenses lower glare in brilliant sunshine.
No glasses lenses — not even glass lenses — are scratch-proof.
However, lenses that are treated front and back with a clear, scratch-resistant coating have a much more difficult surface area that is more resistant to scratching, whether from dropping your glasses on the floor or occasionally cleaning them with a paper towel.
Kids’ lenses, particularly, benefit from a scratch-resistant hard coat for greater durability.
Today, the majority of eyeglass lenses, including high-index lenses and lenses made of polycarbonate and Trivex, have a built-in scratch-resistant coating.
Because scratch-resistant finishes are in some cases optional, ensure your optician knows that you want your spectacles lenses to consist of tough coating for additional sturdiness. Also, inquire about the guarantee on eyeglass lenses that are treated with scratch-resistant coating versus those without the coating.
Bear in mind that even the best scratch-resistant coating can’t entirely safeguard your lenses from wear and tear. To keep your glasses looking brand-new, keep them in a cushioned case when not in use, and clean your lenses with a microfiber cloth and the cleaning service your optician recommends.
Also, watch out for products that promise to fix scratched lenses. These items may fill out the scratches, but it is difficult for them to make the scratches vanish so the lenses look brand-new again.
If you reside in a cold environment, absolutely nothing is more discouraging than having your glasses fog up when you come in from the cold. This likewise can be a safety problem, given that it limits your ability to see until the fog clears. Lens fogging can be specifically hazardous for policeman and other first responders to emergency scenarios.
A minimum of one eyeglass lens coating company (Opticote) has actually developed a permanent coating developed to remove this problem. The factory-applied coating — called Fog Free — removes the condensation of moisture on lenses that causes fogging.
So your lenses and vision stay clear when you make the shift from a cold environment to a warm one. It may likewise keep your lenses from fogging up during sports and other times you are hot and perspiring.
Fog Free can be applied to plastic, polycarbonate and other glasses lenses, consisting of high-index lenses and Transitions photochromic lenses. The anti-fog coating is applied to the lenses prior to they are cut to fit into your frame at the optical laboratory. Ask your optical retailer about prices and availability.
In October 2011, Essilor presented a line of spectacles lenses called Optifog, which the company describes as “a breakthrough lens with an exclusive anti-fog residential or commercial property.”
The anti-fogging home of Optifog lenses is triggered by using a drop of Optifog Activator to each side of the lens, then cleaning the lens with a microfiber fabric to completely spread the liquid throughout the entire lens surface. This treatment keeps the lenses fog-free for up to one week, according to Essilor.
Lens fogging is brought on by small water beads that form by condensation on the surface of spectacles lenses when the lenses are considerably cooler than the surrounding air temperature. Optifog works by evenly spreading these water droplets throughout the lens surface so they end up being invisible, Essilor states.
Optifog lenses are readily available in plastic, polycarbonate and high-index plastic lens products, with or without Essilor’s exclusive Crizal anti-reflective coating.
Another helpful lens treatment is an invisible dye that obstructs ultraviolet (UV) light. Simply as sunscreen keeps the sun’s UV rays from harming your skin, UV-protective treatments for glasses lenses obstruct those exact same rays from harming your eyes.
Too much exposure to ultraviolet light is believed to be a cause of cataracts, retinal damage and other eye issues.
Regular plastic spectacles lenses obstruct the majority of UV light, however including a UV-blocking color boosts UV security to 100 percent for added safety. Other glasses lens materials, including polycarbonate and most high-index plastics, have 100 percent UV security built-in, so an additional lens treatment is not required for these lenses.
Photochromic lenses also obstruct 100 percent of the sun’s UV rays without the need for an added UV lens treatment.