Advances in lens coatings


Anti-reflection coatings provide a number of benefits, including improved cosmetic appearance, greater scratch resistance and better clarity of vision (especially at night and at computer/tablet/phone screens). Sometimes, however, they can be prone to smudging and smearing.

The latest hydrophobic coatings from Zeiss and Rodenstock aim to rectify this problem.



 
By effectively filling in the gaps that exist naturally between the molecules on the top layer of an AR coating, a completely smooth, flawless surface is created that does not collect dirt or dust particles.

The 12 layer+ coating process takes place in a strictly controlled vacuum environment. Both surfaces of the lens are bombarded with specially refined micro-crystals as part of a precision-regulated coating program incorporating the production of no less than six anti-reflective layers, an extra-hard coat, plus additional anti-scratch & anti-glare layers

The end result is that your lenses will be up to 8 times easier to clean, while the ultra-tough hardcoat provides excellent scratch protection & durability.

We supply these new coatings as standard when ordering antireflective lenses so you can be assured of optimum quality.


Also available are blue blocker coatings. These help decrease glare from computer screens, phones, tablets and LEDs. It has also been claimed that excess blue light can contribute to cataracts and macular degeneration in later life, so there may be added health benefits. However more evidence is needed in this area, and there is currently much debate as to what actually consititutes "excess" blue light.


We also offer DriveSafe lenses from German manufacturer Zeiss.

DriveSafe offers three main benefits: improved vision in low light conditions, a reduction in glare and, for varifocal lenses, improvements in refocusing and field of vision.




The reduction in glare is achieved by a multilayer anti-reflection coating which has been optimised for Xenon and LED headlights which are considerably brighter than incandescent bulbs. It works not only by reducing the amount of reflections at the lens surfaces, but by filtering out a section of blue light which gets scattered in the eye. As such it reduces perceived glare by up to 64% over other anti-reflective treatments.




Drivesafe, however, is more than just a coating. Modern digital surfacing techniques are used to take into account the fact that, in low lighting conditions, your pupil size is going to be much larger than normal which can lead to more aberrations, especially in the periphery. The lenses therefore offer greater clarity over a much wider area.

Varifocal lenses additionally feature optimised distance and intermediate viewing zones which reduce the need for horizontal head movement and offer improvements in refocusing. The mid-range zone is 43% larger for easier focusing when switching between dashboard and mirrors, and the far-distance zone is up to 14% larger offering a wider view of the road. This has been achieved without having a significant impact on the reading area.

Though DriveSafe glasses are specially tuned for driving, it's important to note that they can be worn all day. Indeed, their anti-reflection/blue blocking properties make the lenses well-suited for smartphone and VDU use, so they're a great choice for your main pain of glasses.