What is the highest index lens available?

The curvature in a minus lens will get gradually steeper toward the periphery and an advantage lens curvature will gradually flatten toward the periphery. This is important because it provides consistent optical clarity in the lens periphery, not just the center. It also allows for someone with a strong prescription to wear a larger collection of frames without worry of the lenses being too thick. This not only affects the looks of the lens but also reduces the enlarged appearance of eyes (“bug-eyed” look) with high plus power prescriptions that are used for farsightedness. The contrary occurs in high minus power lenses for nearsightedness. In non-aspheric lenses, eyes can appear minified, even though effect isn’t as dramatic since it is for farsighted people.
These decisions, coupled with a 1.74 index and an aspheric design, mean you will see much thinner lenses in the frame. Inside our new example, each factor worked toward the same goal, thinner, more attractive lenses. High-index lenses also have flatter curvatures than their standard plastic cousins. Aspheric design, when combined with high-index resin, will further thin and flatten both plus and minus powers. All these factors make high-index lenses an especially good match for today’s frames, which are of an increasingly flat design. And its high tensile strength makes a 1.67 material a great choice for drilled rimless.

• However, you will need your eyeglasses prescription to ensure you get the right lenses.
• High-index lenses are usually scratch resistant and can fit into almost any type of frame.
• When you’re choosing eyeglass lens materials, additionally, there are some features or enhancements that you might want to consider.

Its main drawback is the high levels of chromatic aberrations, an optical distortion that causes colored halos or fringes around lights or blurred vision. As the prescription strength increases, lenses get thicker and heavier. Higher-index material provides thinner and lighter lenses, which makes them a good option for anyone who has a strong prescription. There’s much more to buying a new pair of eyeglasses than simply selecting the perfect frame. There are various lens materials, lens coatings, tints, etc. and it will often feel overwhelming. Understanding the different lens options available could make the process significantly less stressful. These details will explain the essential types of lens materials available and the most common lens options.

Lightweight Verithin Lenses

1.74 high index lenses can get up to 10% lighter & thinner than 1.67 high index lenses and an impressive 50% lighter & thinner standard CR-39 lenses of exactly the same prescription. The vast cost range is set partly by the eyewear retailer or brand you select but could be blamed mostly on the exponentially increasing costs of higher index lenses. Simply put, the bigger the index number, the thinner the lens, and the more you can expect to pay. Again, for those of you which have had strong prescription leading to thick lenses, this is the real game changer as you will literally be lifting the weight of one’s glasses off of your face. Actually, high index lenses of just one 1.60 or more typically create a 25% – 50% reduction in overall lens weight in comparison to conventional lenses.

Another advantage that Trivex has over polycarbonate is that it can be easily tinted. While thicker lenses are more affordable and can accommodate low levels of vision correction needs, thinner lenses are lightweight, sleek and can accommodate all sorts of vision need. A middle of the street option will be the Arise Collective Clarity 4K lens with index 1.61.

Kids’ Glasses

Polycarbonate lenses have a higher index of refraction (1.586) than CR-39 plastic (1.498) and are therefore thinner in an equal lens prescription. With an increased index , light is bent more efficiently, therefore it requires less material to attain the eyeglass prescription making the lenses much lighter. Another significant advantage of these lenses is they are impact resistant.

Eyeglass lenses are often categorized by their refractive index . We have qualified opticians on call to reply to your questions and help you choose lenses and frames. All lenses offered by VisionDirect are covered by20/20 Enhanced Lens Insurance, a warranty based on the value of the frames you purchase with up to 5 years coverage. We have qualified Optical Dispensers available to answer your questions and help you choose lenses and frames. Additionally, they’re lighter than both of these lenses despite only having a marginally larger index than polycarbonate. A 1.5 standard index lens is suitable for people with a weak prescription looking for an affordable option.
Trivex is much better suited for tinting and is an excellent choice for rimless drill mounted frames. Trivex could be slightly thicker than polycarbonate lenses, but due to its specific gravity the weight will be similar. In times past, strong prescriptions meant thicker, heavier lenses, giving some a “glass bottle” appearance. But now, with high index glasses available in thinner, lightweight plastic , lens wearers with stronger prescriptions will get more attractive, yet equally effective, lens products. Because high-index lenses bend light more, anti-reflective treatment is frequently recommended as an add-on for optimum clarity of vision.

What Other Factors Should I Consider Whenever Choosing My Lens Index?

and yet may be heavier than thicker lenses (if they are made of a material with a much higher specific gravity0. The weight of high-index lenses depends on a factor called the specific gravity of the lens material. Rx-Safety.com is a family-owned and – run optical lab and web store. Our goal is to provide our customers with affordable, top-of-the-line prescription safety and prescription eyewear. The 1.74 high index lens may be the thinnest option available, designed for those with the highest prescriptions, and is the best option in case you have a high prescription.