Types of sun lenses

Sunglasses are a must-have accessory not only for your style, but also because they are an essential barrier to protect your eyes from the sun's rays.


Choosing the right glasses can be a complicated task, as there is a multitude of options in terms of frames, lens colours and technologies.


In this article we would like to tell you about the different types of sunglass lenses that exist.


Because when it comes to protecting our eyes from the sun, it is essential to understand the different types of filters available. They not only offer protection, but also improve the quality of vision under various light conditions.


What do the lens colours mean?


Colour filters are designed to improve perception in different light conditions and for various activities.


Colour indicates the ability to filter light, it is not just a question of aesthetics.


In general, darker colours offer more protection, while lighter colours allow more light to pass through.




They practically do not alter colour perception, making them a good choice for driving.




Ideal for outdoor sports, as they improve contrast and depth of field.


Recommended for people with myopia and/or astigmatism.


Yellow or Orange


Contrast levels are increased, perfect for low light conditions. Not recommended for sunny days.




Optimal for water sports.


Colours are perceived with practically no alterations, reducing the intensity of light without affecting the clarity of vision.


They are also recommended for people with hyperopia.


Beyond colour: polarised and photochromic lenses


Polarised lenses


They have a special filter that blocks reflected light from horizontal surfaces such as water, road or snow. This makes them ideal for driving, water sports or mountain activities.


Their main benefit is the reduction of glare, providing clearer and more comfortable vision.


Photochromic lenses


They are a type of ophthalmic lens that automatically darkens when exposed to bright sunlight and lightens indoors or in low-light situations.


In other words, they function like prescription sunglasses that adapt to lighting conditions.


Filter categories: 0 to 4, what does it mean?


The sun filter categories indicate the level of visible light absorption offered by the lenses.


Category 0


These are near clear lenses, suitable for low light conditions or indoor use.


They are not recommended for outdoor use in direct sunlight, as they only absorb between 0% and 19% light.


Category 1


Slightly tinted lenses, suitable for medium light conditions.


They offer some protection against UV radiation and absorb between 20% and 56% of light.


Category 2


Medium colour lenses, recommended for most outdoor activities in medium-high light conditions.


They offer good protection against UV radiation, absorbing between 57% and 82% of light.


Category 3


Dark lenses, suitable for high light conditions (beach, mountain, snow).


They offer very high protection against UV radiation, absorbing between 82% and 92% of light.


Category 4


These are very dark lenses, exclusively for use in extremely bright conditions (high mountains, skiing, water sports).


They offer maximum protection against UV radiation, absorbing between 93% and 100% of the light.


Their use is prohibited for driving. 


What type of lens do you need?


The best way to choose the right sunglasses for you is to go to your local optician and get professional advice.


They will evaluate your visual needs, your lifestyle and the activities you do on a regular basis to recommend the most suitable type of lens and colour.


Remember that, in addition to UV protection, sunglasses should fit comfortably on your face.


Don't settle for just any glasses, invest in your visual health and choose sunglasses that protect you and make you feel good.


In Opticas Perea we offer you a wide variety of models of the best brands, such as Zadig & Voltaire, Carolina Herrera, Guess, Tom Ford and many more!


Come to our optician's, receive professional advice and discover the latest trends in sunglasses.