SEIKO OPTICAL PRODUCTS

The Transitions® lens can be used in the same way as a general purpose spectacle lens both indoors and outdoors.

• Light entering the eye is adjusted automatically to enhance visual quality (contrast sensitivity).
• A single lens fulfills the 2 functions of a clear lens and a colored lens.
• Indoors, the lens retains the clearness of an ordinary clear lens.
• The lens cuts out almost 100% of harmful UV rays. In addition, glare is reduced to alleviate tiredness of the eyes and stress.
• Compatible with single vision and progressive lenses and all kinds of frames.
• Lens colors: gray / brown

One of the major features of the Transitions® lens is its coloration/fading speed. When the wearer steps outdoors, the lens reacts to UV rays to quickly change to a comfortably dark lens color, quickly changing back to a clear lens when the wearer returns indoors.

*The performance is affected by temperature, UV exposure and lens materials.

Could you tell me about the functions of the Transitions® lens?

The special photochromic dye used in the Transitions® lens darkens when exposed to UV rays and returns to a clear state as the intensity of the UV rays becomes weaker. This enables change to a natural, comfortable color matched to changes in light. The Transitions® lens constantly functions to block out UV rays whether in a clear or colored state. Changes in the lens colors in accordance with the intensity of UV rays or temperatures serve to protect your eyes from harmful rays present in visible light.

Can the Transitions® lens be used instead of clear lenses?

Yes, it can. Because the Transitions® lens is constantly clear indoors, just like a regular clear lens, it can be used in the same way as a clear lens.

How quickly does the Transitions® lens react?

The Transitions® lens begins to darken the moment it is exposed to UV rays. The greater the UV-ray intensity, the darker the color of the lens. The lens reverts to a clear state when no longer exposed to UV rays. When you step outside, the lens will quickly darken and will return to a clear state once you return indoors in accordance with the temperature. Due to the properties of the photochromic dye, the higher the temperature, the faster the speed of return to a clear state: Conversely, the lower the temperature, the slower the speed of return to a clear state.

Does the degree of darkness of the Transitions ® lens differ depending on factors such as
the lens type or strength?

Basically, the lens darkness remains constant regardless of differences in lens type, design or materials.

Why is it important to protect the eyes from UV rays?

Although there are a lot of people who take various measures to protect their skin from UV rays, few people realize the need to protect the eyes from damage caused by UV rays. The results of investigations have demonstrated that continued long-term exposure of the eyes to UV-A and UV-B rays without some kind of protection can cause conditions such as cataracts or other eye diseases, while blue light present in visible light rays can lead to conditions such as age-related macular degeneration. Nowadays, many eye specialists recommend continuous protection of the eyes from UV rays. Like UV-cut clear lenses, the Transitions ® lens blocks out almost 100% of UV rays that can damage the eyes.

Can the Transitions® lens be used for sunglasses?

The degree of darkness of the Transitions® lens depends on factors such as the intensity of UV rays and temperature. The Transitions® lens darkens to a degree more or less the same as sunglasses in intense sunlight (UV rays) when the temperature is low. However, during the summer months, for example, when UV rays are intense and the temperature is high, the lens tends to darken only to a slight degree. To protect the eyes from glare during the summer, it is recommended to use together with a separate pair of sunglasses. For further information, please check with your local opticians or eye specialist.

Is the Transitions® lens suitable for driving?

The lens color takes time to return to its clear state in tunnels or dark parking lots, or at sunset, for example, and this can be extremely dangerous since it may result in temporarily degraded vision. Use of the lens should be avoided in such places or at such times. It should be noted that the front windscreen of many automobiles is furnished with UV-cut functions that results in almost no coloration of the Transitions ® lens. Please check with your local opticians or eye ophthalmologist for information on whether you need light-regulating lenses when driving.

Is the Transitions® lens suitable for working on computers?

Yes, it is. In situations where ordinary clear-lens spectacles can be used, the Transitions® lens can also be used in the same way. Transitions® lenses provide an even more comfortable field of vision both indoors and outdoors, during the day ort at night.

How does the Transitions® lens reduce glare?

When exposed to UV rays present in sunlight, the Transitions® lens darkens and returns to a clear state when the UV-ray intensity decreases. This enables control of light permeation, thereby reducing glare.

Does the Transitions® lens also improve vision?

Yes, it does. The Transitions® lens enhances the ability to discern brightness and contrast, making is possible to see in any light.

What about the UV-ray cut performance?

Like UV-cut clear lenses, the Transitions® lens block out almost 100% of UV rays that can damage the eyes.

Are there any special cautions that should be observed when using the Transitions® lens?

Because they can be handled in the same way as ordinary lenses, there are no special cautions to be observed, they do however differ from sunglasses and special lenses, for example a Polarizing lens, and this means that it may not be possible to achieve the blocking performance required for applications for such lenses. In addition, because the lens will not instantaneously revert to its clear state when the wearer moves into the shade in cold weather, the wearer may experience temporarily degraded vision due to a lack of light and, as a result, it is not advisable to use the lens in situations where degraded vision may present risks.

Does the coloration of the Transitions® lens become darker at high temperatures?

Although the lens colors when exposed to UV rays, the speed at which the lens returns to its clear state increases at high temperatures, even at high UV-ray intensity, and this tends rather to imbue the lens with a lighter color. Although dependent on usage and environmental conditions, the lens color is considerably lighter at high temperatures (30 degrees or higher) that its original coloration density (Value measured by SEIKO).