We all know that sunbathing, following a series of recommendations, and avoiding the central hours of the day, are beneficial for health. The damage it can cause to the skin without proper precautions is also well known. However, many are unaware of the damaging effects of solar radiation on vision without proper eye protection.
According to experts, for every hour of sun exposure, the probability of developing visual disturbances increases by 4%, including discomfort or injuries to the cornea, degenerative eye pathologies, and, in the long term, can cause more serious injuries such as tumors.
Solar damage is cumulative and irreversible, and 80% of the solar radiation that we accumulate throughout life is received in the first eighteen years of life. 20% of blindness cases are related to sun exposure.
The use of sunglasses in summer is very important to protect ourselves from UV rays but making sure that they have 100% protection against UV rays. It must be emphasized that it is worse to wear glasses without protection than not to wear them.
When choosing glasses, you have to take into account:
– 100% protection against UV rays. For your info, Ray ban sunglasses have 100% protection.
– Envelope. The larger they are, the less sensitive areas of the eye will be exposed to the sun.
– Polarization: it is an option that gives us the possibility of reducing reflections and making them more comfortable for vision.
– Tint: the color of the glasses does not influence the protection. As long as it is 100%, it is only a matter of aesthetics.
Types of filters required
When choosing summer sunglasses, pay attention to the existing category of filters that indicate the intensity of the tinting of the lenses. The darker they are, the greater the protection.
The levels of protection are divided into five categories called filters:
– Filter 0: colorless or very light filter, with a glass shade of 3 to 20%, has the least protection. Its use is recommended to protect from wind and dust. They are recommended for sports.
– Filter 1: yellow or orange lenses. The shade of the glass is between 20 and 57%. They are recommended for days with little solar radiation and cloudy days. They protect from wind and dust.
– Filter 2: with a glass shade of 57 to 82%, it is suitable for normal summer days. The tint of the glass is slightly lighter than regular sunglasses. Highly recommended while driving and on sunny days in autumn and spring.
– Filter 3: Shaded from 82 to 92% offers intensive protection. The dark color of the lens is suitable for the strong summer sun.
– Filter 4: with 92 to 97% shade is suitable for high mountain areas, glaciers, water sports, and desert areas where sunlight is highly reflected. It has a very dark glass coloration, and its use for driving is prohibited.
Sun damage to the eyes
Solar radiation can cause photochemical damage to the retina and cornea. Infrared rays can be able to burn external tissues and can cause blind areas in the eye. Various studies have revealed a direct relationship between solar radiation and:
– Ocular cataracts, being the main cause of blindness in the world.
– Visual aging
– Photokeratitis and conjunctivitis, deterioration of the cornea.
– Pterygium, abnormal growth of tissue from the conjunctiva to the cornea.
– Macular degeneration, tissue degeneration that causes a dark spot in the middle of the visual field.
The eyes of children and adolescents are more vulnerable than those of adults to the harmful effects of solar radiation. Annual sun exposure is three times that of adults because they spend more time outdoors. In addition, their ocular structures and tissues are less developed than those of adults, and, therefore, they have fewer defense mechanisms against solar radiation. The pupil is more dilated, allowing more radiation to enter, and the pigmentation of the eye is not yet complete, leaving it unprotected against solar radiation. The lens filter does not finish developing until the age of 12, so everything that the cornea does not filter ends up passing to the retina.
So what are you waiting for? Just buy high-quality sunglasses to protect your family this summer!
Featured Image by Jill Wellington from Pixabay