Blue Light Blocking lenses: Blue light blocking lenses filter out blue light emitted by digital screens, limiting digital eye strain. All Reading lenses: These lenses help with near vision tasks such as reading. Transitions: Glasses with transitions lenses automatically adjust to the amount of light in the environment you are in. Caring for Glasses With Lens Coatings If you decide to get lenses with a special coating, there are additional steps you have to take to take care of them. We recommend the following care steps when dealing with coated lenses: Use cleaning products without harsh chemicals that can damage the coating Wet the lenses before you clean them to avoid scratching Use a microfiber cloth The Takeaway When you buy a pair of glasses, you should consider the many benefits coated lenses have to offer.
Peripheral Vision Loss. Share This Article:. Written by Justin Bazan Dr. More Articles by Justin Bazan. Visit Our Location. Contact Us Email: [email protected]. Hours Monday. Book Your Appointment. Our Reviews. Our Services.
Our Brands. View All Our Brands. Contact Us. Follow Us. Because anti-reflective coating on glasses allows more light to pass through to your eye, your eyes can relax while wearing your glasses. Your vision will be clearer and sharper, resulting in less need to strain and focus hard to see.
With our busy lives, careers, and our ever-increasing use of technology and blue light, eye strain and fatigue is on the rise. Why not utilize an anti-reflective coating on your glasses to protect your eyes and keep them comfortable? Anti-reflective coating on glasses is not the same as a scratch coating. In fact, because some of the older anti-reflective coatings were softer than the lens material beneath it, it could actually scratch more easily than an uncoated lens.
However, the newer anti-reflective coatings have been designed to more readily resist scratches. Along with that, most manufacturers offer a scratch warranty on their anti-reflective coatings. That way if your lenses do scratch, the company can easily replace them. Some anti-reflective lenses have surface treatments that are both hydrophobic and oleophobic also called lipophobic , which means they repel both water and oil. These combination treatments typically contain fluorinated materials that give the lenses properties that are very similar to those of nonstick cookware.
Applying anti-reflective coating to eyeglass lenses is a highly technical process involving vacuum deposition technology. The first step in the AR coating process is to meticulously clean the lenses and inspect them for visible and microscopic surface defects. Even a tiny smudge, piece of lint or hairline scratch on a lens during the coating process can cause a defective AR coating. Modern vacuum coating machine for applying AR coating to eyeglass lenses.
Image: SatisLoh. Typically, a production line includes multiple washing and rinsing baths, including ultrasonic cleaning to remove any traces of surface contaminants.
This is followed by air drying and heating of the lenses in special ovens to further remove unwanted moisture and gases from the lens surface. The lenses are then loaded into special metal racks with spring-loaded openings so the lenses are held securely but with virtually all lens surfaces exposed for the coating application. The racks are then loaded into the coating chamber. The door of the chamber is sealed, and the air is pumped out of the chamber to create a vacuum. While the lens racks are rotating in the coating chamber, a power source within the machine focuses a beam of electrons onto a small crucible that contains a series of metal oxides in separate compartments.
When the coating materials are bombarded by electrons, they vaporize within the coating chamber and adhere to the surfaces of the lenses — creating a uniform, microscopically thin optical layer on the lens. Some eyeglass lenses have factory-applied AR coating on both lens surfaces.
Other lenses, particularly progressive lenses and other multifocal lenses bifocals and trifocals , have the coating applied after the lenses have been customized to your eyeglass prescription by an optical lab.
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