What is the difference between 1.50 and 1.61 lenses?

Lens index is a measurement on the lens thickness chart that dictates the thickness of one’s lenses. Created from higher-quality material, a higher index lens should be able to deliver better correction with no need for thicker lenses. [newline]What exactly are high index lenses, and what are the differences between polycarbonate vs. high index lenses? Higher prescriptions require high index lenses to help keep them thin and light. High index lenses tend to be very stylish and lightweight and so are designed for glasses wearers with high prescriptions. The 1.50 standard index plastic lenses were the initial option to glass lenses.

In less technical terms, therefore high index lenses are better at bending light rays for vision correction. As a general rule of thumb, the bigger a lens’s refractive ability is, the less material is needed to achieve a specific prescription strength. A number of the light passes through the lens, this is called refraction, some is absorbed and changed into heat energy and the others bounces off. To improve both the vision through the lenses and the appearance of the glasses, an anti-reflective coating is applied. The bigger the prescription, the thinner and lighter the lens recommended. If you have a strong prescription and are looking for thinner, lighter lenses with a more attractive appearance, high-index lenses are the way to go.

Do I Need High Index Lenses?

Weighed against traditional lenses, highly index lenses can bend the light more efficiently, so they can be thinner while maintaining the same correction power. Lenses generally become thicker and heavier as optical power increases.

So far as the “UV Blue Blocker” option, it generally does not necessarily include A/R coating. UV is referring to the amount of ultraviolet light transmitted through the lens.
These lenses could be less than half the weight of regular glass lenses and 25% to 30% lighter than regular plastic lenses. So, if you want the thin, attractive eyeglasses, choose lenses made of a material that has a high index of refraction . Generally, the higher the refractive index of the lenses, the thinner your glasses will undoubtedly be. Created for high prescriptions – these lenses will be the thinnest & lightest plastic lenses available today! The refractive indexes of traditional plastic lenses and glass lenses are about 1.5 and 1.52 respectively.
You’re bound to be offered multiple choices for lens materials, most commonly, high index and polycarbonate. If you’re like most, you probably put far more thought into selecting your frames than your lens material. Our High Impact 1.56 index lenses offer superior optical clarity, whilst delivering a light weight, impact resistant lens that’s comparable to Polycarbonate lenses. The optical lens material would work for use in the development of light-weight lens. The MR™ Series offers 3 different refractive index products (R.I. 1.60, 1.67, 1.74). With the inclusion of the high refractive index material, you’ll be able to achieve thinner lenses with exactly the same strength as thicker lenses.
Both polycarbonate and Trivex lenses are thinner and lighter than regular plastic lenses. This material can be an extremely light and impact resistant material. This is a great choice for semi rimless and rimless frames due to its tensile strength. This can be a strongest lens material in existence and is therefore recommended for use in children’s, sports and safety glasses. They’re also ideal for strong prescriptions given that they do not add thickness when correcting vision, minimizing any distortion. In addition to being obtainable in different lens materials, eyeglass lenses are also available with different design features. Two popular types of eyeglass lenses are photochromic lenses and progressive lenses.

Optical

Simply put, when you have high index lenses, they will be thinner. Conversely, if your prescription glasses are fitted with less lens index material, they’ll be thicker. For the best frames, Felix Gray supplies the variety you want regardless of your lens index. Coupled with our innovative lens technology, such as Blue Light filter glasses and sleep glasses, you’ll love your new pair of glasses. Contact Felix Gray today, and shop with reassurance thanks to our free shipping and free returns policy.

• This kind of lens is particularly useful for those individuals with higher prescriptions.
• Some individuals is now able to correct refractive errors with thinner lenses without compromising efficacy.
• Lens materials which have an increased index of refraction produce thinner glasses.

With prescriptions of this power, the reduced thickness with high-index will make-up for the increased weight. Generally speaking, high-index is most effective for higher prescriptions. Anything above a minus 5 and above a plus 3 is known as high-index territory. High-index materials are denser than lower-index polycarbonate, this means they bring about thinner lenses as a way to refract light accurately. The frames you decide on are what everyone will notice, but needless to say the lenses have the effect of correcting your vision.

With the high refractive index and high Abbe number of these Monomers comparable optical performance to glass lenses can be achieved. In addition, glass mold-casted MR™ Series shows minimal stress-strain and the optical quality is more advanced than injection molded polycarbonate lens. Overnight Glasses offers prescription eyewear and replacement lenses — which customers can shop online. Essentially, the higher your prescription, the bigger the index you’ll want.