Difference Between 1.61 And 1.67 Lenses

It’s around 10X more impact-resistant than high-index lenses and is therefore the ideal lens material for sports protective eyewear and children’s glasses. Generally speaking, high-index is best suited for higher prescriptions.
index chart ranges between 1.5 standard index to 1 1.74 high index. Oliver can be an ABO Certified Optician and has been working in the eye care industry for over 15 years. His books, videos and articles touch on various subjects, such as eye care, good tech habits, motivation and leadership. Polycarbonate ranks lowest predicated on a way of measuring chromatic aberration called “Abbe value,” which indicates just how much light a specific material disperses. The industry has long sought a forward thinking material that provides these properties in a balanced way.

There are a billion different prescription combinations, and there are several factors in each prescription rendering it unique. If you’re looking for the best type of lenses for your prescription, it’s likely that that you’ll be buying wide selection of options. If you’re looking for your next pair of glasses, search no further than Rx-Safety. High-index lenses mean that the lens itself can be both thinner and lighter. This allows your glasses to be as fashionable and comfortable as possible.
But sometimes wearers with an inferior average PD can’t use Standard and require something more custom. Thanks to modern tools, this is where Digital Free-form comes in. At Payne Glasses, we offer Digital Free-form better value than competitors. To learn more about Standard vs. Free-form lenses, watch this helpful video. Prescription is not the only real factor used to determine which lenses are right for you personally.

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If you’re wondering whether these kinds of lenses are a good option for you, this is everything that you need to know. If you’ve been given a strong prescription to improve your vision, high index lenses are an optimal choice. These lenses are extremely lightweight, making them comfortable to wear all day. They can be fitted to a number of frames, allowing you to pick a pair that matches your personality. Generally of thumb, should you have a strong prescription, high-index is the way to go. Most opticians would agree a prescription over a minus 7 or perhaps a plus 5 should be produced with high-index lens materials. With prescriptions of the power, the reduced thickness with high-index will make-up for the increased weight.

However, thinner lenses won’t indicate they’ll weigh less. The same attribute that allows high-index to be thinner, helps it be heavier.

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Our High Impact 1.56 index lenses offer superior optical clarity, whilst delivering a light weight, impact resistant lens that’s much like Polycarbonate lenses. This type of lens is particularly useful for those people with higher prescriptions. That’s to state, progressive lenses will be the closest to how natural vision is you could get in a pair of prescription eyeglasses. All bifocal eyeglasses at our website are constructed of plastic index 1.56 and it comes automatically with anti-glare, anti-scratch and UV protection coatings. Ultra Thin Lenses (High Index 1.67)- These lenses are ideal for prescriptions of SPH ( ±6.0 to ±8.0), CYL (0 to ±3.0). High index lenses with 1.74 high index will be the thinnest lenses on the market, and are made only for people with the best prescriptions.

• This lens index is a fantastic option for those with a brilliant prescription.
• The lens index is a numerical representation of the refractive power of the lens material, which determines the thickness of the lens.
• 1.74 High Index Lenses are normally 50% thinner than ordinary CR39 plastic.
• Read on to learn more about these specialty lenses and to see a set of trustworthy places to get them.
• In addition, your optometrist can accurately measure your pupillary distance , which ensures that your pupils are in the center of your lenses.

On the other side of the spectrum, when you are nearsighted your lenses are thinner in the center and thicker round the edge. These lenses use “minus” measurements to reference the degree to which these lenses are thinner in the centre when compared to edges. The 1.59 is probably polycarbonate which will be lighter and impact resistant, but does have a little bit of distortion. Versus the 1.6 lens could be more optically clear, but will undoubtedly be heavier and not impact resistant . The thinnest option available and designed for people that have the best prescriptions, 1.74 high index lenses are the optimal choice should you have a high prescription. 1.67 high index lenses are incredibly thin and light, even surpassing 1.61 high-index lenses.

In accordance with this table, a lens with an index of just one 1.74 could be up to 50 percent thinner when compared to a regular plastic lens with an index of just one 1.50, with exactly the same optical prescription. The image below compares the lens thickness of a normal plastic lens (1.50) to probably the most commonly prescribed high-index lenses. The refractive index may be the number that represents how efficiently a lens material bends light, and would depend on what quickly light travels through the material. The 1.74