Lenses

We are ZEISS specialists.

Lenses, Lytham Eye Wear

We are ZEISS specialists. ZEISS also supplies back surface lens technology, To find out more about back surface lens technology "Click Here"

Single Vision Lenses. Single vision lenses have the same power across the lens and provide a single focus for either distance vision, near vision or intermediate vision.

Bifocal Lenses. These are great for both distance and near vision, for example, watching TV or reading the paper.

Varifocal Lenses. Are multi-vision lenses, suitable for distance (driving/TV), intermediate distances such as reading shelf edge labels, the computer and for bridge. They are also used for close distances, for example when reading. To find out more, Follow the link here: "Back Surface Varifocals". As a time-served lens surfacer I know exactly how lenses used to be made 30 years ago and am still surprised to see people putting up with the old designs.

With cutting-edge advances in lens design, progressive lenses permit faster and easier adaptation. This enables sharp, instantaneous vision at every focal length, from distance vision through intermediate to near, for presbyopic patients.

Office Lenses. Whilst a traditional varifocal is made with a priority for distance vision, the Office/Occupational lens is made in reverse with the emphasis on a big reading area at the bottom and a far wider intermediate area. As you look up the lens, the power gradually tails off to work at the distance that would best suit.

For example A hairdresser would need the close vision , but would still want to be able to see across the salon through the top of the lens. Whereas an accountant sat at a desk would benefit from the top of the lens working at a VDU screen distance yet still give great reading.

Transition Lenses. The latest innovation from Transitions. These are designed to quickly adapt from clear indoors to a darker state in changing light conditions. As clinically necessary, the lenses offer the required 100% protection from UVA and UVB rays. However, they do not react behind most modern car windscreens as the screen blocks most UV. They are also temperature dependant and cope quite well up to about 23 degrees, but on a beach holiday most people would agree a dedicated sunglass is best. The best dedicated sunglass to reduce the glare is a polarized lens

High-Index Lenses. With today's evolving technology, thin and light lenses are available for all prescriptions. They offer a superior cosmetic appearance, excellent optical performance and are lightweight for comfort.

Polycarbonate Lenses. These are lightweight, impact resistant lenses. They are suitable lenses for undertaking sporting activities and are widely used in the manufacture of safety spectacles.

Anti Reflective Coating. The eyes are the window to the soul! Unfortunately when looking at some spectacle wearers you cannot see their eyes clearly because of reflections from the surfaces of their lenses. These reflections not only look unattractive, they also affect the vision of the wearer.

Lenses With anti-reflection coating
Lenses With
‘anti-reflection’ coating.

Lenses Without anti-reflection coating
Lenses Without
‘anti-reflection’ coating.

Back surface lenses are all treated with an ‘anti-reflection’ coating. These coatings are so effective that there are virtually no reflections evident on their lenses.

In addition, ZEISS applies a scratch-resistant hard coat and a water-resistant top layer that makes your lenses easy to clean. This means that you continue looking great while seeing clearly.

Many spectacle wearers find driving at night uncomfortable, as glare from oncoming headlights is increased due to reflections on spectacle lenses. ZEISS anti-reflection coatings remove virtually all reflections and make night driving more comfortable and safer.

DuraVision® Platinum The ZEISS Premium Coating.
The demands of everyday life call for hard, dirt-resistant lenses that are easy to clean. This is precisely why hard, anti-reflective lens coatings exist – but it needs to be said that the quality of these coatings can vary greatly.

What makes ZEISS lenses with DuraVision® Platinum AR coating different? These hard and light lenses are very robust, dirt-resistant and easy to clean, while offering first-rate, anti-reflective properties. An integrated system of coating densely layers packed, using ion-assisted deposition results in a lens surface that is three times harder than the previous generation of hard, anti-reflective (AR) coated plastic ZEISS lenses and 35 % harder than AR coated mineral (glass) ZEISS lenses. ZEISS lenses with DuraVision® Platinum AR coating also have a more cosmetically pleasing, blue residual reflex colour, that produces over 20 % less luminous reflectance than conventional green AR coated ZEISS lenses. So, what are the benefits?

1. More robust
New ZEISS lenses with DuraVision® Platinum AR coating are three times harder than the previous generation of hard, anti-reflective (AR) coated plastic ZEISS lenses and 35% harder than AR coated mineral (glass) ZEISS lenses.

The comparison: without DuraVision® Platinum (2. picture, left) and with DuraVision® Platinum (2. picture, right).

2. Dirt-resistant
The patented fifth anti-static layer prevents the build-up of static electricity. As dust and lint are not attracted to the lens surface, lenses stay cleaner, longer.

The comparison: without DuraVision® Platinum (2. picture, left) and with DuraVision® Platinum (2. picture, right).

3. Very easy to clean
The super-slick clean coat makes lenses very easy to clean. Lenses with high contact angles repel oil and water more effectively. ZEISS lenses with DuraVision® Platinum AR coating have a contact angle of more than 110° (lenses without super-slick clean coat: 95°).

The comparison: without DuraVision® Platinum (2. picture, left) and with DuraVision® Platinum (2. picture, right).

4. Anti-reflective properties
A new and less noticeable blue reflex colour increases the luminous transmittance of the lens, resulting in even better vision. These lenses demonstrate more than 20% less luminous reflectance than conventional green AR coated ZEISS lenses.

The comparison: without DuraVision® Platinum (2. picture, left) and with DuraVision® Platinum (2. picture, right).

Sunglasses. Did you know our eyes receive as much light in winter as they do in summer? Yes, the the sun is weaker in winter but it's also a lot lower and generally in our eyes more. Most of us are aware of the dangerous effects of UV rays on our skin, but few of us realise the danger imposed on our eyes. Whether from natural or artificial sunlight, UV rays can damage the surface tissues of the eye, including the cornea. The risk of cataract onset is also increased and damage to the retina, particularly the macula, can occur. All of our sunglasses (prescription and non-prescription) provide the required EU protection. Find out more about our "Sunglasses"

Polarising Lenses. A polarising lens manages reflections and supresses glare from any flat or shiny surface, resulting in a cleaner and sharper image. For example, polarising lenses eliminate glare to make water appear more transparent, enabling one to see fish and rocks below the surface. Similarly, polarising lenses will provide better definition for use when driving and during sport, removing dazzle and reducing eye fatigue. "Pop in for a demo - How to find us". Click the following link to find out more about Prescription sunglasses and "Polarising Lenses".

Polarising Lenses Explained
Suitable for both men and woman. they can be used in prescription glasses, sunglasses and goggles, ideal for travel, urban fashion, golf, cycling, biking, shooting and other sports, including watersports.

What are Polarising Lenses?
In sports and other outdoor leisure activities we react to what we see. We see by virtue of the light that enters our eyes. Without good sunwear, brightness and glare will diminish our best efforts. Glare results in a loss of visual performance, which is produced when an object or light source in the field-of-vision is brighter than the amount of light to which the eyes are adapted. Most tinted lenses will provide some absorption to dampen brightness, but only a polarised lens can effectively eliminate blinding glare.

What causes glare?
Light is made up of waves travelling in different directions. Vertical light is useful to the human eye; it helps us see. Horizontal light, however, simply creates glare. Glare is concentrated light reflecting off a horizontal shiny surface, such as a car windscreen, sand, water, snow or asphalt roads. It reduces visibility and can make it uncomfortable, painful and even dangerous to carry on driving, cycling, skiing or just sunbathing.

How do polarised lenses compare to standard tinted sunglasses?
Regular non-polarized sun lenses indiscriminately filter all light, whether it is horizontal or vertical. Glare is dampened, but not eliminated. More importantly, by filtering all components of light, visual acuity is diminished. On the other hand, polarised lenses allow in the vertical component of light, which is preferred for clear vision, while eliminating the easily scattered and skewed horizontal component of light. Vertically aligned light is preferred, because it respects the natural tendency of the visual system to focus on the vertical component of an image.

Why are polarised sunglasses beneficial for water sports?
The glare of the sun on the sea and other water surfaces is highly polarised. Indeed, the glare can be almost completely horizontally polarised, depending on the height of the sun. In addition, all reflections from objects above water are partially polarized. These include clouds and even the sky (the reflected sky gives most of its blue colour to the sea).These are examples of polarisation by reflection. Although the light from the sun is not polarised, it can be separated into two polarised components that are reflected and transmitted in different amounts by the surface of the water. More of the horizontal component will be reflected than the vertical component, thus partially polarising the reflected light. With polarised sunglasses they will stop the glare and make the sea appear more transparent, enabling you to see fish and rocks below the surface.

Why are polarised sunglasses beneficial for driving?
Polarised sunglasses help when driving a car by reducing those bright reflections of the sun on the cars ahead. They tend to be horizontally polarised, thus perfect for vertically polarised sunglasses. The reason is that the surfaces you see on the car in front of you (the back window, the rear door, and even the roof) are slanted towards you, while the sun will be more or less aligned in the vertical plane through both cars. Polarising lenses will provide higher definition vision for driving, remove dazzling effects and reduce eye fatigue.


With Polarised

Without Polarised

What are the advantages of polarised lenses?
A polarised lens offers the following advantages over a non-polarised lenses:
  • Improves visual comfort.
  • Improves contrast and visual clarity.
  • Reduces eyestrain.
  • Allows for true perception of colours.
  • Reduces reflections and eliminates glare.
When could polarised lenses pose a problem?
For certain sports or activities, polarised lenses are not the best choice. These are as follows:
  • Skiing in icy conditions. Patches of ice are easily identifiable as they reflect more light than snow. Wearing polarised lenses will make icy patches more difficult to see.
  • Spotting oil or icy patches on the road. For the same reasons above, at Lytham Eyewear we do not recommend using polarised lenses for riding motorbikes.
  • Viewing liquid crystal displays (LCDs) - Polarised lenses can make the LCDs of certain objects more difficult to read. As most modern motorbike instruments and the instrumentation in modern aircraft have LCD displays at Lytham Eyewear we do not recommend their use for such activities.
How do I know if my sunglasses are polarised?
Just look through the glasses at the reflection of any object on a window panel. Then, turn the sunglasses around as if they were the hands of a clock facing you. If the intensity of the reflection doesn't change with respect to what you see through the window, they are not polarised. Another way is to hold them at 90 degrees to another polarised pair and if the lenses go dark where the lenses overlap, then your sunglasses are polarised too. If there’s no change, your lenses aren’t polarised.

Do polarised sunglasses work better at different times of day?
Yes. Maximum polarisation is obtained when the sun is at about 37 degrees from the horizon. If the sun is very low or very high, the sunglasses will be of little help in filtering the glare in calm seas. A rule of thumb would be that polarised filters limit the glare from calm waters for a sun altitude between 30 and 60 degrees.

Can I have clear polarising lenses?
No. Owing to the parallel row alignment of the iodine crystals, if they were clear they would not block light in a specific direction.

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