Standard Index Lenses

Polycarbonate lenses are high index lenses that are known primarily for their exceptional impact resistance and anti-scratch coating. If you or your children are always bumping, scratching or dropping your eyeglasses, this is the material for you. Up to 10 times more impact resistant than standard plastic eyeglass lenses, polycarbonate is a first-rate option for people with an active lifestyle. Developed in the 1970s, polycarbonate has been protecting eyes for quite a while.

Impact-resistant and durable, suitable for all sorts of frame style. Due to the high workability of thiourethane MR™, it’s ideal for use in lenses that want precise design. Now, even high-power lenses can be made thin and comfortable to wear. That’s why it’s been eagerly adopted by eyeglass makers all over the world. Oliver is an ABO Certified Optician and has been working in the eye care industry for over 15 years.

Trivex Eyeglass Lenses: Tough And Lightweight

A high-index lens may be recommended if your optical prescription is above 2.00 diopters. This index is adequate for correcting mild to moderate refractive errors, but is not as effective for the correction of higher refractive errors. See a professional optician to discuss your unique need and which types of high-index lenses can be found to suit your budget.

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• High-index lenses generally range from a refractive index of just one 1.59 to 1.74.
• It’s vital that you note comparisons manufactured in this article are between high-index and polycarbonate plastics only.
• Xirm is a material with properties very similar to Trivex, thus rendering it a great choice for sports, youth, rimless and semi rimless frames.
• You will first have to undergo an intensive eye exam which means you obtain the correct prescription based on the outcomes of your exam.

to avoid high index lenses for the first pair of glasses altogether. Your prescription could frequently change in the early stages leading to multiple costly lens changes. Occasionally, the retailer or your local optician could have a buyer satisfaction policy that protects you from lens changes for an interval of days, usually 30 – 60 days. In fact, high index lenses of 1 1.60 or more typically create a 25% – 50% decrease in overall lens weight in comparison to conventional lenses.

Do I Need High Index Lenses?

1.67 index lenses will be around 40% thinner than CR-39 and 20% thinner than polycarbonate . This allows for a flatter base curve with plus prescriptions decreasing “bug eye” and lens distortion. High index lenses will simply cost you more and can drive up your price to your customer. Given the benefits of being thinner, lighter, and stronger, this should be an easy sale. Your customers are wanting better looking lenses so make sure you are providing them what they are looking for.

Rimless, eight-hole drilled, anti-reflective lenses for considering the computer screen all day long, fabricated with 1.67 drillable material with a high-tensile strength. After reflecting on similar situations, the dispenser told the patient that to get the lenses within their best form, another frame would need to be selected. Here are some examples of how deciding on the best high-index material can solve many different patient’s optical and cosmetic needs. Lens cost varies significantly with regards to the retailer, but expect to pay anywhere from $25 – $200 more for your index lenses online. High index lenses come in many different indices ranging from 1.53 to at least one 1.74, with “true” high index starting at an index of at least 1.60.

Types Of Lens Materials

While it is a worthwhile alternative for some glasses wearers, these lenses must be coated because they don’t block UV radiation well, plus they scratch relatively easily. The unique polycarbonate material makes lenses stronger and impact-resistant. Prescription glasses with an increased lens index will have thinner lenses. However, prescription glasses with less lens index could have thicker lenses.