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Guide to Sun Lens Technologies

Sunglasses are available with many different lens technologies, so we have put together a guide of the most common lens technologies available to give an idea of what each lens can do.


Polarised Lenses

To understand how polarised lenses work, it’s helpful to understand a little bit about how light works. When light is reflected from a smooth surface, it's horizontally polarised. That's why these lenses are ideal for driving or fishing. The horizontally polarised light decreases visibility and creates glare.  polarised lenses work to combat this glare by blocking horizontal polarised light. The result is a reduction in annoying, and potentially harmful glare.


 

Polarised lenses reduce glare and give colours a more vibrant look.

Left: Non-Polarised Lens        Right: Polarised Lens

 

Polarised for Driving

alt : Polarised Lenses: CAR

Polarising lenses offer increased safety.  They eliminate the glare produced by reflections on wet road surfaces, dashboards and other cars.


Polarised for Sports

alt : Polarised Lenses: WATER

Particularly useful for water sports (sailing and fishing in particular) and winter sports, whenever the eyes are under constant stress from the sunlight relected by flat surfaces (water, snow and ice).


Polarised for Greater Comfort

In both summer and winter, wearers can rediscover the pleasure of better vision under all circumstances, with colours appearing more vibrant than with normal sunglass lenses.


Graduated Lenses

Many designer sunglasses feature Graduated Lenses which are darker at the top to filter out bright sunlight and lighter towards the bottom.  However, the downside of Graduated Lenses are that they are not as successful at reducing glare from road or water surfaces than that of polarised lenses.


Please Note:  Graduated Lenses are not to be confused with Varifocal/Progressive/Multifocal Lenses found in Prescription Glasses.

 

Graduated Lenses are darker at the top to filter out bright sunlight

 

Photochromic Lenses - Also known as "Transition" or "Reactolite"

alt : Adaptive Tint Lenses

Photochromic lenses are lenses that darken on exposure to UV radiation. Once the UV is removed (for example by walking indoors), the lenses will gradually return to their clear state which are almost as clear as standard plastic when deactivated (approximately 15% absorption).  Typically, photochromic lenses darken substantially in response to UV light in less than one minute, and then continue to darken very slightly over the next fifteen minutes.  The lenses fade back to clear along a similar pattern. The lenses will begin to clear as soon as they are away from UV light, and will be noticeably lighter with in two minutes and mostly clear within five minutes. However, it normally takes more than fifteen minutes for the lenses to completely fade to their non-exposed state.

 

 

A photochromic eyeglass lens, after exposure to sunlight with part of the lens covered by paper.

 

Infrared Lenses

Infrared Lenses offer great protection for high mountain activities where protection against infrared radiation is very important. Cebe offer a selection of Sunglasses with Infrared protection.


Tinted Lenses

Tinted lenses can soften harsh, bright light to relieve eye strain. All of our tinted lenses are 100% UV protected, so why not use them as sunglasses!

These are our standard tints:

- Blue (Light tint)  
- Brown (Medium tint)
- Grey (Medium tint)    
- Pink (Light tint)  
- Yellow (Light tint)
- Dark Green (G15)
- Graduated Brown (Light tint)**
- Graduated pink (Light tint)**

You may also select your own tint percentage. Just advise us in the "Additional info" box when ordering. The maximum tint permitted for blue, pink or yellow is 30%.


**Please Note:  The term Graduated is not to be confused with Varifocal/Progressive/Multifocal.


Clip On Lenses

Some of our popular designer ranges including Rudy Project feature additional Clip On lenses included in the price.  These simply clip on in front of the prescription glasses when required without the need to have two seperate pairs of glasses.


 

 

Rudy Project feature Prescription Glasses with Clip-On Lenses

 

Rear Surface FreeForm progressive lenses

Our rear surface Varifocal design is optimised for each addition, for near vision, the lens also varies with the addition to maximise the reading area and improve the binocular vision.  There is a good balance between different visual zones to enable a smooth transition from far to near areas.


Thanks to its soft power profile, improved lens asymmetry and variable lens, the adaptation to our Rear surface Varifocal lenses are made easier compared traditional lens manufacturing.


Freeform rear surface Varifocals are about to revolutionize the eyewear industry as they will give clearer, wider fields of vision, these are available as standard, Photo-chromic, Polarised, Super Thin 1.6 index and Ultra Super Thin 1.67 index lenses.


Find out more about Rear Surface FreeForm progressive lenses by clicking here.


Free Form optimized prescription’s will ensure the widest fields of vision in comparison to traditional progressive lens manufacturing, as much as 50% larger viewing zones will be achieved with a Rear Surface progressive, this is illustrated in the picture below: