Over 10,000,000 sales since 1982
Näe Paremmin!
Polarisoidut linssit auttavat näkemään tarkemmin auringossa.
Polarized Sunglasses – See More, Be Less Glare
The bright sun on a summer day, wet asphalt, the surface of a lake, or a car’s windshield can cause intense glare that strains your eyes and impairs your vision. This is exactly what polarized sunglasses are designed to address.
Polarized lenses effectively eliminate glare and enhance contrast, allowing you to see your surroundings more clearly and reducing eye strain. Many people who have tried polarized sunglasses once never want to go back to regular sunglasses.
What are the benefits of polarized sunglasses?
The biggest advantage of polarized lenses is their ability to reduce light reflected off horizontal surfaces. This makes your view significantly more comfortable and helps you see details more clearly.
Polarized sunglasses help, for example, to:
- reduce glare from the sun
- reduce squinting and eye strain
- improve contrast and visibility
- see colors more naturally and vividly
- seeing details more clearly in the water, on the road, and in nature
- to increase driving comfort in bright weather
It’s not just about comfort—better visibility can also make it easier to observe your surroundings, for example, while driving or enjoying the outdoors.
Polarized or regular sunglasses?
Both regular and polarized sunglasses can provide effective UV400 protection against harmful UV radiation. Polarization does not replace UV protection; rather, it offers a significant additional benefit.
Regular sunglasses
- protect against UV radiation
- darken your view
- do not effectively eliminate glare
Polarized sunglasses
- protect against UV radiation
- effectively reduce glare
- improve contrast and visibility
- reduce eye strain even during prolonged use
How do polarized lenses work?
When sunlight hits, for example, the surface of water, a wet road, snow, or a car’s hood, the light reflects strongly in a horizontal direction. It is precisely these bright reflections that cause glare and force you to squint.
A special filter inside the polarized lens blocks most of this horizontally reflected light from reaching your eyes. The result is a clearer view, better contrast, and significantly less glare.
When are polarized sunglasses at their best?
Polarized sunglasses are useful in almost all bright conditions, but you’ll notice a particularly big difference:
While driving
Wet asphalt, direct sunlight, and reflections from the car’s surfaces are significantly reduced. Visibility improves and eye strain is reduced, even on long drives.
While boating and on the water
Light reflecting off the surface of a lake or the ocean is reduced, making the water’s surface appear more natural and allowing you to see details more clearly.
While fishing
Polarized lenses help you see better beneath the water’s surface by reducing surface glare. This makes it easier to spot fish, rocks, and the contours of the bottom.
At the Beach
Intense reflections from the water and sand are reduced, making the surroundings look more pleasant and, for example, making it easier to see children playing in the water even in bright sunlight.
Golf and Outdoor Activities
Better contrast makes it easier to see terrain features, greens, and other details. Long days spent outdoors also feel more comfortable when your eyes aren’t strained from constantly squinting.
Who should wear polarized sunglasses?
Polarized sunglasses are an excellent choice for almost anyone who spends time outdoors. They’re especially suitable for drivers, boaters, anglers, golfers, hikers, cyclists, and anyone who wants the most comfortable vision possible in bright conditions.
Frequently Asked Questions
Do all polarized sunglasses also offer UV400 protection?
Yes. Ninja.fi’s polarized sunglasses protect your eyes from harmful UV radiation with UV400 protection.
Should you choose polarized sunglasses?
If you wear sunglasses while driving, at a summer cottage, at the beach, on a boat, or in other bright conditions, polarized lenses generally offer a much more comfortable experience than regular sunglasses.
Do polarized sunglasses improve vision?
Yes. Polarized lenses do not increase visual acuity, but they reduce glare and enhance contrast. As a result, details in your surroundings often stand out more clearly than with regular sunglasses.
UV400 Protection – The Most Important Feature in Sunglasses
The most important function of sunglasses is to protect the eyes from harmful ultraviolet radiation, or UV radiation. Good sunglasses aren’t just a stylish accessory—they help protect your eyes from long-term UV exposure all year round.
All sunglasses at Ninja.fi feature 100% UV protection (UV400), which effectively filters out both UVA and UVB radiation.
What does UV400 mean?
UV400 means that the sunglasses block virtually all harmful ultraviolet radiation up to a wavelength of 400 nanometers. This covers both UVA and UVB radiation, which can strain and damage your eyes over time.
In other words:
- UV400 = 100% protection against harmful UV radiation
- protects against both UVA and UVB radiation
- is one of the most important features of high-quality sunglasses
A dark lens alone does not protect the eyes. Without UV protection, a dark lens can actually increase the amount of UV radiation reaching the eye, because the pupil dilates in dimmer light.
Why is UV protection important?
Your eyes are exposed to UV radiation whenever you’re outdoors—even on cloudy days. UV radiation is particularly intense in the summer, near water, in the mountains, and in the winter, when snow and ice reflect sunlight.
Long-term exposure to UV radiation can increase the risk of various eye diseases. In addition, intense sunlight can cause eye irritation, dryness, and temporary sensitivity to light.
Good sunglasses help protect your eyes from these harmful effects in everyday use.
Protecting Children’s Eyes
Children’s eyes are particularly sensitive to UV radiation, as the lens of a child’s eye allows more UV radiation to pass through than that of an adult’s eye.
That’s why wearing sunglasses is also recommended for children whenever the weather is sunny. The best protection comes from lenses that are large enough to shield the eyes from light coming from the sides as well.
Sunglasses all year round
Many people wear sunglasses only in the summer, even though UV radiation is present in all seasons. Sunglasses are useful, for example:
- in the summer in bright sunlight
- in winter, due to reflections from snow and ice
- while boating and at the beach
- while driving
- while hiking and enjoying the outdoors
Do the sunglasses meet EU requirements?
Yes. All sunglasses sold on Ninja.fi meet the European Union’s safety requirements for personal protective equipment and the requirements of the applicable sunglasses standard. The CE marking indicates that the manufacturer certifies the product meets the relevant EU safety requirements.
CAT Classification for Sunglasses
UV protection and CAT classification refer to two different things. UV400 indicates how well the sunglasses protect the eyes from harmful UV radiation. The CAT classification, on the other hand, indicates how much visible light the lens transmits—in other words, how dark the lens is.
Therefore, sunglasses can have the same UV400 protection even if their CAT class is different.
| CAT Class | Light Transmittance | Suitable for |
|---|---|---|
| CAT 0 | 80–100% | Clear or nearly clear lenses. For light use and fashion glasses. Not for actual sunny weather. |
| CAT 1 | 43–80% | Cloudy weather and minimal sunlight. |
| CAT 2 | 18–43 | Variable weather conditions and partly cloudy skies. |
| CAT 3 | 8–18 | Normal sunny weather. The most common and recommended category for daily use in Finland. |
| CAT 4 | 3–8 | Extremely bright conditions, such as glaciers and high mountains. Not suitable for driving. |
How do I choose the right CAT category?
For most users, CAT 3 is the best choice. It offers a comfortable experience in bright sunlight and is suitable for driving, the beach, outdoor seating areas, boating, and everyday use.
CAT 4 lenses are designed for extremely bright sunlight and must not be worn while driving due to their darkness.
