Sem categoria - 26.01

Ultraviolet rays: how important is UVA and UVB protection?

Whether in summer or winter, with open sun or cloudy weather, we are constantly reminded of the importance of using sunscreen and sunglasses with protection against ultraviolet rays. But, after all, what will these rays cause so bad and what is the difference between them? UVA rays Thanks to...

Sem categoria - 26.01

Divergent and convergent lenses: what are the differences?

Ocular disorders such as myopia and hyperopia occur when, for some reason, the image is focused before or after the retina. To provide quality vision, ophthalmologists recommend the use of divergent or converging lenses, which are capable of shifting the focus point to the retina, making it possible to...