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Which optical lenses should I choose?
To get comfortable prescription glasses and ensure the clearest eyesight, it is essential to choose both a frame that looks and fits great and the most suitable optical lenses. More often than not, choosing optical lenses is the greatest source of confusion and you have to figure out which eyeglass functions you truly need. The main things you need to keep in mind while choosing optical lenses are your eyeglass prescription, type and size of the selected eyeglass frame, and the situations and conditions the glasses will be used in.
When choosing the ideal optical lenses, it is essential to know their exact power or sphere as the optical lens power and situations where the glasses will be used determine their look. If you have glasses for correcting near-sightedness or myopia, the lens edges will be thicker than the centre, however, if your glasses are for correcting long-sightedness or hypermetropia (for instance, if you use glasses just for reading or close distance work), the lens centre will be thicker than their edges. To make the glasses more aesthetically pleasing and comfortable for everyday use, optical lenses with several degrees of thickness are available. Although the visual thickness of optical lenses depends not only on the lens index, but also on the size and material of the chosen frame and the individual user's parameters, for instance, distance between the iris, we suggest picking at least 1.6 index lenses for 2.50 to 3.00D, however, if the lens power is larger than 6.00D, we instead suggest a 1.67 index pair or the highest available index for plastic eyeglass lenses: 1.74.
Currently, the most popular choice for optical lens material in the world is plastic optical lenses as they can fulfil important roles: they are approximately two times lighter than glass optical lenses with the same power, and they are more resistant to mechanical impact, making them much safer for your eye health. However, to attain ideal transparency and, as a result, perfect eyesight, plastic optical lenses require anti-reflective coating. It eliminates unnecessary reflections and ensures extra comfort for the eyes while also being aesthetically pleasing for that additional bit of comfort in eyeglass use.
Optical lens coatings differ not only by how lucid the world looks through the lens but also by how comfortable it is to clean and use optical lenses. Premium lens coating Durva Vision Platinum (DVP) by German manufacturer Zeiss ensures not only the clearest vision, it also completely facilitates optical lens cleaning and ensures the best possible protection against wear and scratches which can appear while using glasses. In addition, this coating is visually very appealing: it does not have the standard greenish reflection, but is rather softly blueish, which gives the impression that the lens is practically invisible.
If glasses are worn not only indoors, but also outdoors, it is worth considering how to protect your eyes from the sun: both against blinding yourself and ultra-violet rays. If you spend time dynamically every day, that is to say, indoors and outdoors, a good choice is photochromic lenses (also known as chameleon lenses) which adapt to the environment: thanks to UV rays, they activate outdoors and darken, while indoors they regain their hue and transparent form. These optical lenses also provide full protection against ultra-violet rays. People with chameleon sunglasses are not the only ones who can protect their eyes from UV rays: all ZEISS optical lenses provide full protection against UV rays.