What you need to consider when choosing sunglasses!

The purpose of wearing sunglasses are for the vast majority to make it easier to see in bright sunlight. It is also important from the point of view of protection when bright sunlight can damage the eye. Sunglasses should be used from an early age to protect the eyes. It is even more important to protect the eye when you are near reflective surfaces such as snow, water and sandy beaches. When the light is reflected, there may be so much radiation that the retina can get burns.

To give your eyes a full protection, one should look for sunglasses that are UV400 protection and CE marked. UV400 stands for protection from ultra violet light up to 400 nm. That the sunglasses only have dark lenses does not mean that it is good enough. In fact, if UV400 protection is not enough in a pair of dark glasses, the eye can be damaged even more as the pupils will be fooled to open even more to let in more harmful light. Grey glass generally provides the best color reproduction. Plastic glass PC (polycarbonate) provides better UV protection than mineral glass and TAC (Triacetate Lenses).

Sunread Sport Lake – Copper colour – filter 3 for use to see into water 

Sunread sunglasses with optical insert

Optical insert is a feature where we manufacture a flexible bridge that holds a couple of optical lenses just inside the protective outer sun lens. Optical insert consists of a lens same as used in ordinary glasses and work the same way. The advantage of insertion optics is that you get greater choice to choose sunglasses lenses. In sports frame that fits around your head and covers the eyes from leaking light makes it very difficult and above all very expensive to produce sunglasses with various optical capabilities.

With Optical insert, it is easy for the user to change the outer lens as necessary. The optical lenses are the most expensive part of the sunglasses but they are protected from the outer sunglass lens. You can easily change the sunglass lens without changing the optical lens.

The negative is that there might be a problem to put in insertion optics with strengths over + 4 or-4. The reason is that minus lenses that are concave becomes thicker at the edges. Plus lenses or convex lenses are thicker in the middle.

This can partly be compensated by using lenses with very high index and aspheric design that are much thinner. The price, however, is higher. High index lenses make them much thinner as well thanks to the fact that it takes less material to make.

Sunread manufactures and designs the bridge and use ASA material which is strong and has UV filter but still flexible, which means that optical lenses is held firmly inside the outer lens. CAD technology with 3D printers are used in the manufacturing process.

Thanks to that Sunread already have 10 various models in the Sports series with or without bifocal lenses gives it a wide selection to choose from. The combination with insertion optics is very flexible and it is suitable for both young and older with or without presbyopia. The variations exceeds 100000 combinations to choose from with 8 different sunglasses lenses, 5 different colours on the frame.

5 different strengths of bifocal lenses, insertion optics with powers in steps with 0.25 diopter variation with plus and minus lenses with or without cylinder strengths for refractive errors as general astigmatism. Most of it is in stock for fast delivery.

Sport Optics with optical insert as per prescription (JUST ADD SUN LENSES OF CHOICE)

       

Sport Optics with dark (filter3) lenses outside and you can not see that there is in fact a pair of prescription lenses on the inside.

Sunread Bifocal sunglasses – “Sunglasses and reading glasses in one go”

As we age, we begin to notice that your vision is no longer as it once was. About in 40-45 years of age, the focusing lens in the eye, crystalline lens, start to become stiffer and less elastic. This results in that the lens can no longer change the mode to adjust the eye to a sharp vision at different distances. For a person with normal vision, this means that it is hard to focus at close range while on the other hand, looks good at longer range. This natural change is called presbyopia and affects us all, sooner or later. However, this can be corrected by using reading glasses or bifocal lenses that help us to that we can see well at different distances. The power that may be needed for presbyopia to see clearly at close range varies between + 1.0 to + 2.5. Do you need more strength than this, there may be other reasons that come into play and you should then visit an optometrist


Sunread bifocal sunglasses solglasögon – All the vital functions in one!

Quality sunglasses for an active live outdoor!

By looking down through lower part of the lens when holding the head still, the vision becomes perfectly clear at close range and then when you look straight ahead, you will see clearly at long distances. With this, you avoid the frustrating switching between sunglasses and reading glasses when you are out in the Sun.

Blue light protection

Harmful rays from Blue Light

Too much light in the ultraviolet and blue-violet bands may cause damage to the human eye. It can lead to painful inflammations of conjunctive and cornea or cause damage to the lens of the eye (e.g. in the form of Cataract) and above all on the retina (macular degeneration).

That is why it is so important to use sunglasses with 100% UV protection in strong sunlight, particularly where a lot of light are reflected, such as. When skiing or being on the water!

With extra blue light reduction “Blue Ray” filter reduces the blue light that reaches the eye in the area of the blue-violet light between 400-425 nm.

Polarised lenses

Light has characteristics that are different from other types of waveforms. One of the differences is that the light can’t just swing up and down and sideways, but in all directions. But it is possible to produce light that only turns in one direction. It’s called to polarise light. The light must first pass through a polariser, light becomes plane polarised. Then if you put another polariser above the first and turn it 90 degrees, the the light will be rejected and the result is that nothing passes through. This can be seen by turning the polaroid sunglasses 90 degrees in front of an LCD screen and it becomes completely black when looking through sunglasses.

The principle is used in sunglasses. Polarising sunglasses removes bothersome glare in a sparkling lake or light reflected from a flat surface. The reason why this works is that when sunlight is reflected it changes its polarisation (turn their polarisation 90 degrees). When light bounced on a surface and hits a polarising lens it will not go through the lens, which means that the light (reflections) will disappear.

Sunread sunglasses comes either with ot without polarised lenses, both bifocal and non bifocal!

Non polarised lenses are commonly used by airline pilots that for many reasons can not use polarised lenses. Reading instruments and other filters in the cockpit window might be blocked out.

Hydrophobic treatment using Nano technology!

With advanced nano technology, it is today possible to make the lenses super hydrophobic that makes the lens reject water & dirt. A self-cleaning effect makes it easier to keep the lenses clean and this also gives a nice shiny appearance. A must on the ocean where water and salt usually leaves deposits on the lens. The technology is taken from the Lotus Leaf that has a hydrophobic surface where water more easily form large water droplets and flows down toward the center of the blade so the plant can absorb water better.

Safety glasses – Certification EN 166 F och ANSI Z87.1+

Sunread Sport models are rated as safety glasses according to the European standard EN 166 FWith letter F which means that all sport models are tested and approved for particles with high speed, low energy appropriations (6 mm steel ball at 45 m/s). The European standard requires the user to assess whether this is sufficient for the purpose. This test is also included in the CE certification for safety glasses.

Sunread Sport models are also tested and certified under the U.S. and international standard ANSI z87.1 + (American National Standard Institute) with the symbol + which means “High impact”. The American standard is only for work protection, i.e. 80 different international companies have defined what protection is needed in different situations/professions and then have developed tests to check that this protection is achieved with different rating for protection. For recreational use and at sports facilities, it is up to the user to determine whether protection is adequate for the purpose.

Sunread sunglasses are certified as safety glasses according to EN 166 F and ANSI z87.1 +

UV (A) – ultraviolet rays of the type A has a long wavelength (315-400 nm) and can easily pass through glas. UV-A rays penetrate too deeply into the skin and causes the pigment we have in our skin to give us a deeper tan.

UV B – rays of the type B (280-315 nm) will not penetrate as deeply through the skin but is the one that allows us to get sunburn. UVB rays help to build up a protective pigment in the skin as the skin heals.

UV C – C-rays from the Sun never reach the Earth’s surface, it is stopped in the atmosphere.

The human body has an amazing ability to repair damaged cells. The lens of the eye is unfortunately the exception and damage in the lens can not repair itself. It is therefore important to protect their eyes from an early age to not have problems later in life. In some environments where the Sun’s rays are reflected, you can actually get the burns in the retina. Places where the rays are reflected (bounced) is on snow, sand beaches and in the water such as lakes, rivers and seas and all flat surfaces with reflective material. Where it is extra important to wear sunglasses with full UV protection when outdoors in strong sunlight.

Effective sunglasses must filter out both A and B rays. A pair of sunglasses that have so-called “UV400 protection means that they filters out all UV rays with a wavelength up to 400 nano meters.

All Sunread models with or without polarising do have UV 400 and gives full protection against UB A+B

Contrast enhancement (Yellow lenses)

Yellow lenses filter out par of the blue light and gives a pleasant feeling when driving a car or wears sunglasses for a longer period of time. For the golfer, a pair of yellow lenses with filter 2 are perfect and gives a good protection against the Sun, but at the same time, a contrast enhancement that allows one to distinguish the ball bette and measure distance more accurate.

Clear yellow lenses (Filter 0) is best in conditions of reduced visibility, dusk and dawn. These lenses are ideal for driving during winter months or when fog, rain and poor visibility occurs. There will be no direct effect at night when it is completely dark and is not recommended for night driving, there must be some kind of natural light to function.

With “Anti Glare” or “Blue Anti reflex” on the inside of the lens, shadow reflexes from the eye through the lens on the inside will be reduced. Glare from oncoming car’s headlights will be less disturbing for the eye.

Sunread Sports Golf have yellow lenses with filter 2 and maximum UV protection with increased contrast enhancement/range finding.

Sports Vision with 14 mm, bifocal lenses – offers increased contrast and light amplification

(the dark blue light increases the intensity of other colours)

Sunread Sports Vision have yellow lenses with filter 0 (zero) and “Anti Glare” with max contrast enhancement

Polycarbonate (PC)

Polycarbonate is a plastic based on thermoplastic polymer. The material is optically clear, heat-resistant and extremely impact resistant. Because polycarbonate is easy to process and mould, it is used a lot in the industry and for sunglasses with a special treatment for increased UV protection. For added scratch resistance, Hard Multi Coating is applied in the moulding process which gives an extra hard surface. 

Difference between TACS (Triacetate Lenses) and PC (polycarbonate) is that when you use the TAC, a Polarising film is added to the lens. This can begin to flake off the at the edges with time, while the PC is injected during casting of the lens and will last the life of the lens. This makes them last longer and provide a brighter lens. PC lenses are also more scratch resistant.

All Sunread’s models have polycarbonate in the lenses, which provide increased scratch resistance and the best UV protection.

Aspherical lenses

An aspherical lens has areas where the curve varies from the middle of the lens to the edge, which makes it flatter the farther out from the center. So what does it matter that a lens is spherical or aspherical? Several, actually:

Spherical lenses (constant curvature) becomes thicker than aspherical, because the latter are flatter at the edges. Spherical lenses gives rise to errors in how light is refracted so called spherical aberration. The latter is due to the fact that light is refracted more at the edges and gives rise to loss of picture quality. Aspherical lenses are, however, more expensive to manufacture but provides better visual and optical values in the whole lens.

All Sunread’s Sport sunglasses have aspherical lenses.

Filter category in sunglasses

Sunread sunglasses models have sunscreen filters 0, 2 or 3 in accordance with the provisions and requirements laid down in standard EN 1836, which ensures that the essential health and safety requirements of Directive 89/686/EEC are met. Our sunglasses are designed to protect against solar radiation including ultraviolet radiation.

Sunscreen filters serve primarily to protect the human eye against excessive solar radiation in addition to increase comfort and improved vision. Your sunglasses should be selected according to the ambient light intensity and personal sensitivity to glare so they do not tire the eyes even if used for a long time.

By evaluating the spectral transmittance is it possible to get a certain light transmittance factor of sunscreen filter, i.e. the ratio of the light that passes through the filter and the incident light flux. Against this background, the filter is classified according to the following categories as provided by a 1836:

Filter-categori
Darkness
Usage 

0 – un-dyed or low toned without any reduction of the solar radiation

1 – low-toned for reduced solar radiation

2 – moderate to heavily tinted universal filters for general use

3 – heavily tinted for protection against intensive solar radiation

4 – very dark to intense solar radiation on snow-ice and sandy surfaces, on water and in the mountains or tropical areas. Not suitable for driving.

CE marking

CE marking is a product label in ESS(EU). The letters CE stands for Conformité Européenne (‘ in accordance with EU directives ‘). A product bearing the CE mark may be sold in the ESS without additional requirements. The conditions for obtaining the CE mark for a product are:

  • The product complies with the essential requirements of health, safety, function, environmental
  • The prescribed control procedures have been followed

All Sunread’s Sunglass with reading view is CE marked

Alla Sunread´s Solglasögon med läsruta är CE märkta 

Base curve (BC) on the lens – flexion of the lens

Base curve relates to the curvature of the lens, which partially determines how deep the framework will end. Sunread sunglasses come with the base curve 8 that is sweeping deeper around the sides of the face, which offer better protection against light which “leaks” into the sides of the frame. The larger the base curve is the flatter is the lens.

Sunread’s sunglasses come with the base curve 8