Tinting
Tinted lenses are lenses that are used in sunglasses and allow us to see objects clearly because they can be graduated, they present several advantages: Estas lentes, que podem ou não ser graduadas, oferecem diversas vantagens:
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Ultraviolet Radiation Protection
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Greater comfort in bright situations
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Used as a fashion accessory
The harmful effects that UV rays cause are well known (waterfalls, pterygium, which are very common in Angola) and therefore all people who spend a lot of time in the sun (fishermen, farmers, street vendors and the like) should wear glasses with certified tinted lenses Athletes who are exposed to the sun a lot should pay special attention and always wear sunglasses. Excessive brightness causes discomfort and does not allow us to see.
When the brightness is ideal, coloured lenses guarantee us comfort because they can reduce brightness by up to 95%. Tinted lenses can have different absorptions ranging from 20% with almost no drop in brightness to 95% with a high decrease in brightness. Lenses can be uniformly tinted (having the same colour on the entire surface of the lens) or gradient tinted to make it easier to read.
Lens colours can be of any colour, but the most common are grey, green and brown. The colour of the lens can be chosen according to the sport practiced and according to the user’s sensitivity to colour, but the most common is that they are chosen solely based on aesthetic criteria. Blue light, when entering our eyes in large quantities and for several years, can accelerate the ageing of ocular structures, particularly the retina.
It can also affect the circadian cycle, thereby disrupting sleep quality. Since blue light in artificial environments (inside buildings, computers, cell phones, tablets, etc.) is present in a much greater quantity than in natural environments and since we are increasingly exposed to these environments for more time per day, it is necessary to have some eye protection against Blue Light.