• - Fast Domestic & International Delivery*
    • - Online Order Tracking + Secure Service with Leading Delivery Companies
    • - Free Shipping on all eyewear
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    • - Easy, No-Hassle Returns Within 100 Days
    • - 2 Year Warranty on ALL Sunglasses & Eyeglasses
    • - 2 Year Warranty on ALL Prescription Eyewear
    • - 3 Month Warranty on ALL Contact Lenses
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    Price Match Guarantee

    Best Price Guarantee* – Find a Lower Online Price and We'll Match It!

    Largest Range, Best Service, Amazing Prices! Since 2006! SmartBuyGlasses offers the world's largest range of designer eyewear products at the best possible prices. For items marked “Best Price Guarantee”, if you find any eyeglasses or sunglasses cheaper* somewhere else, let us know within 14 days of placing your order, and we'll credit the difference back to your account.

    How do I take advantage of the Best Price Guarantee?

    Simply send an email to our customer service: customerservice@smartbuyglasses.co.nz and provide us the website address of the lower-priced item. We'll verify it according to our guidelines and if it's the exact same model number and color, we'll match the price!

    We gladly match the price with the following guidelines:

    *The Best Price Guarantee is valid on:

    The Best Price Guarantee applies to eyeglasses frames and sunglasses only and does not apply to prescription or contact lenses. Any exact, identical brand name glasses model sold online by an Authorized New Zealand dealer as designated by the official distributor/manufacturer. Colors and sizes must be identical. Any item currently in stock and available for purchase on another website that is also available in the same size, style, and color on www.smartbuyglasses.co.nz The item is available on other websites for shipping to your address. Selected eyeglass frames or sunglasses. Prescription lenses and contact lenses are excluded. We include all applicable shipping and other costs of the other website to make a proper cost comparison The Best Price Guarantee is limited to 14 days after you placed your order on www.smartbuyglasses.co.nz.

    When does the Best Price Guarantee not apply?

    We are unable to offer the Best Price Guarantee under the following circumstances (including, but not limited to):

    The offer cannot be combined with a promotion code. Special promotions such as coupon codes, rebates, gift certificates and "buy one, get one free" are not eligible for the Best Price Guarantee. The difference amount is minimum 1 NZD We do not honor other retailers' misprinted or falsely advertised prices for the Best Price Guarantee. Purchases for resale or commercial purposes are not eligible for the Best Price Guarantee. This offer does not apply to items advertised below our cost. We will not price match prescription lenses or contact lenses. The price match guarantee applies to eyeglass frames and sunglasses only. Items on websites that are auction sites, unauthorized dealer sites and/or discount sites. Items that are out of stock, open-box, clearance, outlet center products and/or refurbished items. Items that are not in stock, ready for shipping on other websites

    What happens after I submit my request?

    Within 14 days of your purchase date, SmartBuyGlasses will verify and match the lower price and credit your credit card for the price difference assuming the above requirements apply and are met. The item must be currently available on www.smartbuyglasses.co.nz in the same size, style, and color.

    If you have not made your purchase at the time of applying for the Best Price Guarantee, we can place the order for you at the matched price upon approval.

    Price difference applies to the full cost of the item including tax and shipping (subtracting any promotions). There's a limit of one guarantee claim per item, per order. The difference amount is minimum 1 NZD.

    We reserve the right to verify another online company's product availability, authorized dealer status, and price before issuing a price match credit.

    • We offer free basic 1.5 index lenses on all prescription eyeglasses. We provide opportunities to upgrade and add features during checkout. We make shopping online for your glasses simple, efficient and safe.
Eyeglasses | Optical Center SmartBuyGlasses NZ

Polycarbonate or Trivex Lenses - Which One is Right For Me?

When it comes to eye safety, polycarbonate and Trivex lenses should be the first options you consider. Not only are they thinner and lighter than other lens materials, but they are 10 times more impact-resistant than ordinary plastic or glass lenses. They also provide 100% protection from UV rays.


These characteristics are especially key when you are considering purchasing sports or children’s eyewear but relevant for all glasses lenses. Both polycarbonate and Trivex lenses are safe and convenient choices for each, but they differ in some areas, offering a slightly varied optical experience. Read on for more information about which lens type is right for you.


Polycarbonate Lenses vs Trivex Lenses



What are polycarbonate lenses?

Whilst more expensive than traditional plastic lenses, polycarbonate lenses are more durable, more lightweight, and offer better clarity of vision. They also offer guaranteed UV protection. In comparison to Trivex lenses, they are also more cost effective.

Polycarbonate lenses were first introduced in the 1970’s for use in aerospace programs and activities. The material was used for astronaut helmet visors, as well as space shuttle windshields; proving beyond a doubt the material’s durability.

Ever since their introduction to the commercial eyewear market in the 1980’s, polycarbonate lenses have become the standard for all children’s and sports eyewear, as well as commercial safety glasses. Because of their durability to withstand fractures, polycarbonate lenses are also most commonly used for both semi-rimless and rimless eyeglass frames. Polycarbonate lenses are commonly used for polarized lenses, photochromic lenses (also known as transition lenses) and sunglass lenses.


Trivex Lenses


What are Trivex Lenses?


As with polycarbonate, Trivex material was actually developed for alternate uses to eyewear. Originally used by the military for fighter jet windshields and other military applications, Trivex is famously one of the most durable materials on the market. As Trivex lenses are made from a very similar material to polycarbonate lenses, they perform in much the same way in terms of their weight, durability index and UV protection.


The key difference that sets the two materials apart however, insofar as providing an optimum eyewear experience, is that Trivex lenses have a higher Abbe value. This is because they are made up of a urethane-based monomer, which refracts less light. Materials with a higher Abbe value provide clearer and crisper visual clarity.


What this means in real terms is; when lenses are made of materials with a lower Abbe value there can be certain aberrations depending on conditions. Ie. The wearer may notice fuzzy or rainbow haloes around lights. Because of its high Abbe value therefore, Trivex lenses can offer a better optical experience than polycarbonate lenses. This is especially the case for those with higher prescriptions, as the severity of the aberrations tend to increase with stronger prescriptions.

Choosing the right frames for your lenses


It is recommended that you choose your frames and lenses for glasses based on what you need them for. The more information you have, the more informed your choice can be.


Polycarbonate Lenses Advantages and Disadvantages

Both polycarbonate and Trivex lenses are durable and lightweight, making them excellent choices for all children’s eyewear, as well as for sports and safety glasses. Lenses cannot be considered in isolation, however, as all lenses must be placed within suitable frames. Wearing regular eyeglass frames during physical sports or outdoors activities is not recommended because the frames themselves can easily break or fall from your face. In this regard, you need to decide whether polycarbonate or Trivex lenses are best suited to the frames you have, or wish to purchase.

Trivex Lenses vs polycarbonate lenses

In situations where clarity is key, you may wish to invest in Trivex lenses for their higher Abbe value, and so increased visual clarity. Additionally, if you have a stronger than average prescription you may wish to invest in Trivex to avoid annoying abnormalities in your daily vision, such as haloed lights or a distorted peripheral vision.

For more information, speak to our expert opticians.

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