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Sunglasses have long become a fashion item. This is not bad but do not neglect your health functions. In addition to the aesthetic side, we must take into account the protection of our visual health. Thus, the materials of the lenses can be of several types, all are equally good, but they differ in their physical characteristics, as specified by Antonio Carlos García Ruiz, optician optometrist and member of the network of independent opticians of CECOP.

The glass of sunglasses can be mineral, i.e. ophthalmic glass, heavier, scratch resistant, but delicate against impacts, and for safety reasons should not be used in glasses for sports use. OR organic, made with plastic-derived ophthalmic materialsLightweight, impact resistant, but sensitive to scratches and scratches. Recommended for sports use.

The expert recalls that the best place to buy sunglasses is an optician health establishment, since the buyer will be sure that the product complies with all health and safety regulations, in addition to the legal guarantee, being also advised by a professional optician optometrist, who will recommend the best option based on your needs.

It is not the same to use sunglasses in a city, than to use them in the mountains or on the beach, for example, given that UV indices are different and therefore adequate protection will be needed in each case “, says the expert.

In this sense, it highlights that there is no age at which to start wearing sunglasses, but rather that they should be used under the same premises in adults and children. In addition, García draws attention to the fact that taking into account that children’s eyes are evolving and growing, it is more attention is desirable, especially when it comes to preventing “unpleasant surprises.”

Vision problems

In fact, it regrets that poor quality sunglasses can arise various problems in our vision, from dizziness or headache to more severe by exposure to UV radiation.

“To defend against ultraviolet radiation, in addition to the eyelids and eyelashes, the human eye has structures that block a large part of these rays, achieving that very few of them can reach the retina. The cornea and lens ensure that this radiation hardly reaches the retina, where it could cause irreparable damage, “warns the CECOP member.

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García also insists that the most common problems are superficial keratitis, which causes photophobia and a sensation of grit in the eyes that usually improves by staying with the eyes closed for a few hours. “This picture can be avoided by wearing appropriate protective glasses“, warns.

Other problems that can arise from not wearing glasses in good condition are cataracts (clouding of the lens), which are observed more often in people living in equatorial or elevated areas: “Epidemiological evidence about the causal relationship between UV and cataract allows us to ensure that protection against these rays is not only convenient but necessary to avoid the development of senile cataract”.

Moreover, it maintains that, Although the lens and pigment epithelium largely protect the retina, there are radiation that affects it, as in the typical “burn” of the photoreceptors of the foveal retina, from seeing a solar eclipse without adequate protection. There are also studies that ensure the causal relationship between solar radiation and age-related macular degeneration.

The right glasses

With all this, the CECOP member remarks that first assess the type of protection: “In terms of protection, two types must be assessed. The amount of light that passes through the lens, that is, the shade of darkness. And the amount of ultraviolet radiation that filters.”

In addition, it says that in the mounts it should be observed: the mCE arch, which guarantees that it complies with European regulations regarding manufacturing and protection, the level of visible light protection transmitted on a scale of 0 to 4 or with letters A, B, C, D and 100% UV protection.

“Sunglasses should be chosen based on the activity that is intended to be carried out with them. Polarized lenses and the non-polarized ones must have maximum equal protection against the passage of light and against ultraviolet aggression. However, polarized lenses eliminate annoying reflected light, so for bright situations with a lot of reflection they are ideal, for example, for the beach and for the mountains, mainly with snow, “he adds.

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He says that glasses with polarized lenses are also highly recommended for driving as, when used, Sun reflections on the windshield of the car in front of us will not be appreciated, or the sensation of water that appears in summer on the asphalt, for example.

“Even within polarized lenses there are qualities and processes in the treatment of the lenses that complete and improve them, such as enhancing color vision or anti-reflective“, clarifies the optician optometrist. Regarding the choice of the tinting tones of the lenses, yes, the CECOP member maintains that it is a “very subjective aspect“, since each person must choose the color with which he is most comfortable and provides a greater contrast.

“It is true that some colors can slightly modify the colors of the objects we are looking at. Thus, brown will attenuate the bluish tones and enhance the reddish tones, perhaps that is why it is more recommended for driving. Gray and green are more neutral colors that hardly modify the colorations. There are also color variations such as gradient colors (darker above than below). Each shade is recommended for an activity. Levels ‘4’ or ‘D’ are not recommended for driving, as they are lenses that are too dark, “says García Ruiz.

Likewise, he points out that in sunglasses it is “absolutely necessary” that 100% UV protection be applied: “It is regulated by law, and the damage it can cause in the medium and long term can be irreparable. In addition, it must be taken into account that most retinal injuries are painlessTherefore, if we are applying harmful radiation to our visual system for a long time, we will not have the discomfort immediately, but the damage will accumulate and when we face, we may have a significant injury “.

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