Buying proper glasses requires enough knowledge about the specifications of the glasses. There are many different types of lenses on the market today, each created by different technologies. Each of these technologies is used to improve the different lifestyles in the modern world. Better knowledge of these technologies will lead to better selection and purchase of glasses. In this article, we introduce the technology of progressive lenses, photochromic and blue control. Familiarity with these features makes you choose glasses that have all the three technologies mentioned below, so instead of buying three different pairs of glasses, you can get only one buying the right glasses will help you save money.
Progressive lenses are multifocal lenses that look exactly like single vision lenses. These lenses correct the vision gradually and seamlessly, from top to bottom, at all distances. As a result, one does not notice any changes in the focal position of the lenses, and so there is no need to change glasses when doing things like driving (far vision), looking at the computer (middle vision) and studying (close vision).
Photochromic lenses are special types of lenses that start out clear and turn dark in the bright sunlight. They offer a convenient way to protect your eyes outdoors from UV rays and bright light without having to carry around a pair of sunglasses.
Photochromic lenses rely on silver chloride or silver halide to react to UV light and darken. This technology offers lenses which are darker outdoors and fully clear indoors. They return clear fast as well without compromising the quality.
Photochromic lenses are available in a range of materials (e.g. glasses, polycarbonate or plastic).
Photochromic performance can be influenced by temperature, so lenses can also take longer to adjust in the cold. This feature can be annoying, especially when one is using them inside vehicles.
Blue light is at the end of the white light spectrum. The wavelength of the blue light is short and very energetic. Although exposure to blue light is normally beneficial to human health, overexposure to this light is harmful to humans. In addition to sunlight, digital screens such as LCDs and LEDs, mobile screens, tablets and computers are other sources of blue light. Today, the modern life requires the daily use of these devices, and so people's eyes are exposed to blue light rays more than usual. To protect the eyes from these rays, glasses with a protective cover against blue light are usually recommended.
As mentioned above, different technologies are used in making different glasses. By combining these technologies, Hotta has created glasses that have the characteristics of all three mentioned technologies. In fact, with the use of progressive lenses with photochemical coating and blue light control, it is no longer necessary to use three separate glasses for different situations. In addition, these lenses protect the eyes from ultraviolet rays and electromagnetic waves. Also, the anti-dust and anti-fog properties in different weather conditions provide a clear vision. By choosing these lenses, you can have up-to-date and smart glasses for your daily life.
