Eyeglass lens treatments

Once you’ve selected your lenses, you should then consider the lens treatments which suit your needs. For the most comfortable, durable and best-looking glasses, the following lens treatments should be considered essential:

Anti-scratch coating.

All lightweight spectacle lens materials have surfaces that are significantly softer and more prone to scratches and abrasions than glass lenses. The softest eyeglass lens is also one of the most impact-resistant: polycarbonate. But all plastic and high-index plastic lenses require a factory-applied anti-scratch coating for adequate lens durability.

Most of today’s modern anti-scratch coatings (also called scratch coats or hard coats) can make your eyeglass lenses nearly as scratch-resistant as glass. But if you’re not careful with your glasses or you’re buying eyeglasses for your kids, ask about lenses that include a warranty against scratches for a specific period of time.

Anti-reflective coating. (AR)

An anti-reflective coating makes all spectacle lenses better. AR coatings eliminate reflections in lenses that reduce contrast and clarity, especially at night. They also make your lenses nearly invisible, so you can make better eye contact and others aren’t distracted by reflections in your lenses. AR-coated lenses are also much less likely to have glare spots in photographs.

Anti-reflective coating is especially important if you choose high-index lenses, because the higher the refractive index of a lens material, the more light the lenses reflect. In fact, high-index lenses can reflect up to 50 percent more light than CR-39 lenses, causing significantly more glare, unless AR coating is applied.

UV-blocking treatment.

Cumulative exposure to the sun’s harmful ultraviolet (UV) radiation over a person’s lifetime has been associated with age-related eye problems including cataracts and macular degeneration. For this reason, people should protect their eyes from UV rays from early childhood. Thankfully, polycarbonate and nearly all high-index plastic lenses have 100 percent UV protection built-in, due to absorptive characteristics of the lens material.

But if you choose CR-39 plastic lenses, be aware that these lenses need an added coating to provide equal UV protection afforded by other lens materials.

Photochromic treatment.

This lens treatment enables eyeglass lenses to darken automatically in the sun’s UV and high-energy visible (HEV) light rays, and turn to clear (or nearly clear) when indoors. Photochromic lenses are available in virtually all lens materials and designs.

Very important: Always make sure you discuss and make decisions about your eye care based upon a formal appointment with your optician.

For more information and to book and eye examination please contact us: 

Specs Direct  |  Professional Affordable Eyewear

20 McIntyre Street, Parow, Cape Town 7500

Tel: 021 939 1020

info@specdirect.co.za

Note: We are contracted to most medical aids

www.specsdirect.co.za

Note: We are contracted to most medical aids