What are Polarized Lenses?
The sunlight reflected by any surface,for example flat road, while driving,walking on the beach are known as polarized rays.This creates an annoying and something dangerous intensity of light that we experience as GLARE.This polarized rays can damage our RETINA and can make us blind for some time. Long term exposure to sun glare has been known to cause CATARACT. Thankfully, polarized lenses can shield you against the dangers of intense glare.
Polarized lenses are those lenses which contains â€œspecial filtersâ€ that blocks this type of intense reflected light which harms our eyes. Though polarized sunglasses improve comfort and visibility. Polarized lenses improves contrast and visual clarity ,it reduces reflections and eliminates glare. Polarized lenses are the most advanced lenses available in the market. â€œPolarized lenses eliminates the glare and help you to see clear imageâ€
It can happen to anyone; even to those who have never experienced vision problems. Near vision begins to blur,
and that ebook, menu, or cell phone needs to be held at arm's length in order to focus on it clearly. It's called
presbyopia and comes with aging. Our eyes get less flexible and less capable of focusing up close.
The good news is presbyopia can be treated easily with progressive lenses. Also referred to as "no-line" bifocals progressive lenses pack a vision-correcting punch, taking care of near vision, far vision and everything in between.
Q. Progressives versus bifocals â€“ what's the difference?
A. With progressives you get smooth, continuous vision at near, middle, and distant focal ranges, with no lines or unsettling image jumps. Bifocals, on the other hand, correct near and distance vision only. There's a visible line between the two fields of vision. That's what creates an often-annoying image jump when you go from one distance to another.
Q. Do people get better vision with progressive lenses?
A. Not necessarily better, but more natural, for sure. Transitions from one distance to another will be uninterrupted, and you'll see clearly across all visual areas. When you're driving, for example, you'll be able to read a map, the mileage on your dashboard, or the signs on the highway â€“ all in one smooth sequence.
Q. Are progressives hard to get used to?
A. They can be â€“ to varying degrees for different people. When you first wear them, you may experience a short period of distortion or wobbliness in your vision until you get used to them. For some people, it only takes a few minutes, others, a few days. There are some where it can take a couple weeks, too.
Q. What are the different types of progressives?
A. Some have wider or narrower fields of vision. If you do a lot of work at close range, such as bookkeeping, needlework or reading, your near field of vision may be wider to meet those needs. If you work at a computer, on the other hand, the mid-range â€œcorridorâ€ that is characteristic of progressives may be larger. Your eye doctor will help you find the right kind for your lifestyle and habits.
Q. Are progressive lenses expensive?
A. They tend to be more expensive than other multifocal lenses, but most people who wear them say the natura and clear field of vision is worth the extra cost.
Q. Do I need a special frame style with progressive lenses?
A. Lens designs today are more compact, so you can choose small, stylish frame designs
Anti-Reflective coating (also called as ARC lenses or anti glare coating) improves your vision through your
Anti reflective lenses eliminates reflection so your eyeglass lenses look nearly invisible. Anti-reflective coatings are incredibly thin. The entire multilayer AR coating stack generally is only about 0.2 to 0.3 microns thick, or about 0.02 percent (two one-hundredths of 1 percent) of the thickness of a standard eyeglass lens
Due to reflection is eliminated you get much more sharper vision than regular non-coated lenses. There are several other benefits of ARC lenses
The ARC lenses available in RUPALI OPTICIAN contains 5-layers of chemical coating which eliminates reflection,blocks harmful rays coming from computer,TV,mobile and gives you sharp and crystal clear vision. Thus reduces eye-strain.
HOW IT IS MADE
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.
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 specia 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 th 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 bombarded by the beam of this electron "gun" in succession, the metal oxides are transformed into vapors that fill the coating chamber and adhere to the lenses in a specific order to form a precise multilayer AR coating.
Polycarbonate lenses are up to 10 times more impact-resistant than plastic or glass lenses and they provide 100% protection from the sun's harmful UV rays. They are also lightweight, adding to the comfort of your eyeglasses, sunglasses, and sports eyewear.
A High-Flying History of Polycarbonate
Originally designed for canopies covering cockpits in fighter planes, polycarbonate offered an impact-resistant, optically clear window. This enabled pilots a full-field of vision without compromising safety. In the 1970s, the popularity of polycarbonate soared (literally!) to outer space as NASA began using it for astronaut helmet visors and space shuttle windshields.
Polycarbonate was introduced to consumers in the 1980s as a safe, affordable alternative to standard plastic and glass eyeglasses. Today, polycarbonate lenses set the standard in eyewear safety. These lenses are a smart choice for athletes, those who work in hazardous job environments, and especially for children. Kids have a greater tendency to drop their glasses and play a bit rough, so ideally all childrenâ€™s frames should have polycarbonate lenses. Polycarbonate lenses are also ideal for people who wear rimless eyeglass frames, because they are less likely to fracture than plastic or glass lenses