According to statistics, every second inhabitant of our planet has vision problems. Experts from different countries are doing the calculations, the picture is the same everywhere. For example, in Germany, 39.4 million people wear glasses, which is 63% of people over the age of 16. Australian scientists found that in 2000, 1.406 billion people suffered from myopia, which was approximately 23% of the world’s population. This figure is projected to triple by 2050. Let’s add to this number all those who resort to protecting their organs of vision from ultraviolet radiation and who have farsightedness, and as a result, we get that almost every person is faced with the issue of choosing a frame for glasses.
What are glasses made of?
Any standard frame consists of two parts:
The nose bridge is considered the most important part of the frame. It can be naked or with nasal stops, which in turn are divided into fixed and movable. It is from the correctly selected bridge that depends on how comfortable the glasses will stay in place, without pressing or sliding off.
By design, frames are divided into
The lenses are attached with screws.
What are modern frames made of?
Spectacle frames are made from plastic, metal alloys, and natural materials.
In the production of plastic frames, the following chemical compounds are mainly used:
If we are talking about metal models, then the following materials could be used in their manufacture:
Modern production tends to use materials and products which have increased strength. Your attention is invited to a wide selection of frames made of titanium and alloys with theircontent. Titanium models are not cheap, but in this case, the price corresponds to the high quality of the product.
Natural materials used in optics include:
Models made from natural materials are distinguished by originality and natural beauty.
How to choose a frame size?
The main criterion for choosing a frame is convenience. It’s simple – you should not feel discomfort. Therefore, fitting before buying is mandatory. The model should not press, it should sit comfortably on the bridge of the nose and not be too loose. When tilting your head, the glasses should not slide down, so choosing products with silicone nose pads to fix the glasses softly and firmly is better. Look at yourself in the mirror. Please note that the upper part of the frame does not cover the eyebrows and is not higher than theirs, and there is a gap between the lower part and the cheeks.
On each model, manufacturers apply the main dimensions in millimeters. One temple is usually marked with the name of the manufacturer. So, you should always buy from reliable glasses shops as the quality of the product is dependent on the manufacturer. The second earpiece contains the main parameters of the product. The first digit indicates the frame’s width, then the bridge’s width is indicated, and the last digit indicates the length of the temple.
Conclusion
Choose a model depending on the distance between the pupils and coverage of the head, the correct focusing of vision depends on this. You should also consider the thickness and, accordingly, the weight of the inserted lenses because for massive glasses you need a more solid and durable frame.
