Sunglasses are much more than a fashion accessory. They help protect the eyes from ultraviolet rays, which can affect different structures of the eye. However, dark lenses do not necessarily provide effective protection.
Lens Darkness Does Not Determine UV Protection
The colour and darkness of a lens primarily reduce the amount of visible light that reaches the eyes. Protection from ultraviolet radiation comes from the properties of the lens material or a treatment incorporated into it.
This means that very dark lenses may provide insufficient UV protection, while nearly clear lenses may effectively block UVA and UVB rays. To make an informed choice, look for UV400 protection or a label indicating 99% to 100% protection from UVA and UVB rays.
Polarization and UV Protection Serve Different Purposes
Polarized lenses reduce distracting glare reflected from surfaces such as water, snow, and roads. They can improve visual comfort and clarity, particularly when driving or enjoying outdoor activities.
However, polarization does not automatically guarantee complete UV protection. It is therefore important to make sure your sunglasses offer both features.
The Shape of the Sunglasses Also Matters
Sunlight can reach the eyes from above and around the sides of the frames. Larger or slightly wraparound sunglasses therefore provide better coverage.
This protection is especially important near water, on snow, or at higher altitudes, where UV rays may be reflected by surrounding surfaces. Even on cloudy days, some ultraviolet radiation can pass through the clouds.
Protection for Everyone, Starting in Childhood
Children often spend a great deal of time outdoors. Like adults, they should wear sunglasses that provide complete UV protection, along with a wide-brimmed hat during prolonged exposure.
People who require vision correction can also choose prescription sunglasses. This allows them to enjoy clear vision, greater comfort, and appropriate protection at the same time.
Choosing the Right Sunglasses
Beyond appearance, several factors should be considered, including the level of UV protection, optical quality, frame coverage, lens durability, and the activities for which the sunglasses will be worn.
Your eye care professional can help you select sunglasses that truly meet your needs. Visit an IRIS store to find sun protection suited to your vision and lifestyle.
