Guide for Choosing Sunglasses

The market offers a wide variety of options of sunglasses in colors, size and specific design of lenses for certain activities such as driving or skiing. These are the keys to make the best choice.

  • Sunglasses should not be worn indoor
  • The short-sighted tends to be more comfortable with brown crystals
  • The polarized lenses block reflected light

Quick Guide for Choosing Sunglasses

Why should we wear sunglasses?

To protect from ultraviolet radiation, which is invisible and can cause eye damage from sunburn on the eyelids to carcinomas. In addition, sun glaring reduces the intensity of the light, which can be uncomfortable and even dangerous activities like driving.

What factors should keep in mind to buy sunglasses?

They must be approved by the EU and protect 100% of ultraviolet radiation (the regulations allows a small margin of difference). The mount must fit well to our face.

The index of protection from 0 to 4 refers to the UV filter?

We must distinguish between brightness and radiation UV. The categories from 0 to 4 indicate the percentage of light that passes up the lens. The darker it is, the more it will reduce the light intensity and more comfortable will be the vision. As for the UV filter, it should be 100%. Color, or the darkness nor the type of lenses is related to the capacity to protect against the harmful effects of the sun’s rays.

How polarized lenses make the difference for you?

With this type of lenses we avoid part of the reflections that we could not remove, avoiding glare with a conventional sunglasses. The polarized reflected light block and only let in light useful by providing a more clear vision with greater contrast.

What use is the polarized lense?

In the circumstances in which reflections are especially annoying, for example, when activities occur in the sea (sailing, fishing, beach…) or driving, because they reduce eyestrain.

Are they not recommended in any activity?

They are not recommended if the activity to be carried out will be combined with other polarized glass (such as those that carry sometimes components of vehicles such as rear window, the display of the box of the vehicle, browsers, etc.). For example, if the vehicle panels are liquid crystal, chances are you will not see well.

Can polarized glasses produce distortions on the road?

The polarized let see laminate crystals armored vehicles and shop windows (as if a grid), as opposed to the conventional lenses that is not appreciated. If the polarized sunglasses is not high quality, to interbreed with cars carrying armored glass distortion or the feeling of that looks blurry can occur.

How do lenses become mirror?

They are coated on its surface that allows them to reflect some of the light blocking comes to the eye. Its use is recommended for practicing water sports and winter or in situations in which there are very bright light that can dazzle. This mirrored coating can be added to any lens.

What applications are yellow crystals and oranges desirable for?

Improve the quality of vision at long distances are therefore recommended for night driving. Should not be used if there is much light intensity.

Are there more suitable colors based on activities carried out?

As well as yellow crystals and oranges are especially recommended for night driving and rapid movements, like the tennis sport, the green shades are very practical for sailing and skiing, for example. This color reduces the brightness without interfering with the clarity of vision.

Should a myopic person take into account any color in particular?

The short-sighted tend to be more comfortable with the crystals of Brown in situations of sunny days. In the overcast days or low light will find better lenses oranges, that will improve them the contrast sensitivity, given the worst state of your retina, argues the ophthalmologist. The latter could be spread to all over the world, but people with myopia can thank him more.

What other colors are recommended for people with eye problems?

Green sunglasses are ideal for those with hyperopia. Brown lenses are recommended for people who have undergone surgery of refractive surgery or if they have cataracts.

What are the colors that most enhance the color vision?

Brown, grey and green crystals are that less alter the colors of the vision.

All sunglasses can be set?

Yes, including large, and curved frames except the screen (which are often used for snow). Very high settings may be inadvisable to graduate them.

Are there sunglasses for indoor wearing?

No, sunglasses should not be used indoors because they reduce the quality of vision. Only for people that really are bothered by the artificial light a lens with filter 0 might be helpful.

What is the peculiarity of the sunglasses with photochromic lenses?

These crystals will brighten or darken depending on the intensity of the light of each moment. They are advisable for the iris clarity and also for driving.

How long can a pair of sunglasses last? Do I have to change them?

They can last for many years if stored properly, avoiding leaving them in places with very high temperatures that can deform them (for example, in cars, on the top of the radiator or on the beach towel) and avoid scratching. In the case of photochromic lenses(which darkens when there is natural light and are enlightened in the dark), eventually it will be losing its ability to be clarified, but continue to protect the same view.

Are lenses with filter against UV rays effective?

It is one of the latest: lenses graduated with sunscreen. Like sunglasses with graduation, lenses have some filter, but it’s insufficient. Regardless of the lenses, sunglasses with 100% filter is recommended. In addition, lenses only would protect the inside of the eye, not the surface.

What are category 4 lenses?

This feature is that most stops visible light. These crystals are like lenses mirror used in high mountain, very useful because the intensity of the light is doubled in the snow.

Is it true that polycarbonate lenses improve the protection of the eyes from UV rays?

Like colors or polarized lenses, those of polycarbonate does not influence the UV filter. It’s an unbreakable material, intended for sports.

What types of sunglasses include blue blocker filter?

Specialists clarify that this filter is not related with the UV but with blue light radiation has negative effects on the eyes, and in order to protect them from it, it has created filters for computers, glasses, contact lenses, etc. However, after consultation with ophthalmologists, we gathered that still nothing has been proven in humans.


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