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    • - Fast Domestic & International Delivery*
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    • - Free Shipping on all eyewear
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  • 100 DAY RETURNS
    • - 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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  • BEST PRICE GUARANTEE
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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.

  • LENSES INCLUDED
    • 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

Spherical Aberration and Aspherical Lenses - What Are The Differences?

What is Spherical Aberration?

A correctly functioning lens focuses all incoming rays of light onto a single focal point.

Those of us lucky enough to enjoy 20-20 vision have eyes which focus light onto our retinas like this, meaning we don’t need glasses!

But a distance vision impairment, such as near or farsightedness, usually stems from having a focal point which does not align perfectly with the retina. 

Just like our eyes, artificial lenses can also suffer from imperfections.

So-called simple lenses, or spheric lenses (like we find in magnifying glasses or reading glasses) are concave or convex lenses that looks like they have been cut out of a sphere: as such, they do not focus light perfectly, and the degree of imperfection is known as a spherical aberration.

Aspherical Lenses

Aspherical lenses, on the other hand, have a more complex surface curvature, which compensate for the aberration.

This is especially useful for people who have strong prescription powers for nearsightedness, which can lead to a “bug-eye” look with classical lenses.

Aspherical lenses are much thinner, thus reducing the magnifying effect. This also gives the wearer a slimmer profile, as the frames do not need to be as thick or chunky.

Optical Advantages

The aesthetics are not the only advantage of aspherical lenses.

Their optical quality is also superior. In conventional, “simple” lenses, the further away from the centre of the lens we look, the more distorted our vision becomes.

Aspherical lenses offer a wider field of clear vision, as well as improved peripheral vision.

The same rule applies to camera lenses too, and top-spec models also feature an aspherical curvature.

If you are interested in trying out the advantages of these lenses, all of our glasses come with aspherical lenses, as testament to their superior quality both optically and aesthetically.

For more information, speak to our expert opticians

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