How to determine the size of points for children and adults?

Now glasses began to perform not only a protective or corrective function, but also serve as a fashionable accessory that can change the appearance of a person and complement the stylish image. There are several functional types of lenses, and even more forms of frames. But before you buy a model you need to know how to determine the size of glasses, so that they are comfortable and comfortable to wear.

Correct landing of the said accessory is very important, because it will be very sad when an expensive purchase after a few minutes of wearing will squeeze some parts of the face or, conversely, fall off it during inclines.

If the frame has dimensions that do not match your anthropometric parameters, then do not buy even the model you like.

Basic geometric dimensions of glasses

In order not to make a mistake in choosing a suitable frame, you need to know how to determine the size of the glasses. To help in selecting a frame, there are several common parameters that allow you to select a convenient model without much effort. There are only four:

1. The width of the lens.
2. The height of the lens.
3. The width of the bridge between the rims of the lenses.
4. The length of the temples.

When choosing glasses with progressive lenses, one of the parameters of the frame is of particular importance: the height of the light apertures. During the selection of narrow vertical rails, the height of the lens should correspond to the progressive design of lens glasses.

It is best to contact an ophthalmologist or optician-consultant who will help to check the correctness of the choice. For this purpose, they check the compliance of the minimum installation height that is indicated for the selected model of spectacle lenses, as well as the size of the selected frame for these glasses.

The size of the glasses on their rim

The main parameters that help when choosing glasses are indicated in millimeters, they can be seen on the inside of the behind-the-arc arch. These numbers will help you answer the question - how to determine the size of points. Ray Ban, Oakley, Persol and other manufacturers of brand models of these accessories indicate the main parameters on their products. For example, you see the numbers 60 - 14 145 on the inside of the temple, they correspond to the following indicators: the width of the opening, after it through the dash or through the square icon indicate the width of the bridge, and further, through the space, - the number that indicates the length of the temples.

The indicator of the width of the spectacle lens is very rarely indicated.

And on some glasses of inexpensive price category, you can find only one number - it corresponds to the length of the ear hook.

As a rule, the frames of sunglasses are larger than the frames of glasses with the corrective function.

Determine the width of the face

Accurate knowledge of the width of the face will help solve the question - how to determine the size of points. At home, measuring the width of the face is a bit difficult, but possible.

To do this, you need two pencils or pens to be laid behind your ears, and the distance between them is measured with a ruler.

Let's demonstrate one more way how to determine the size of glasses, focusing on the size of the lens. You need to subtract from the width of your face the size of the arch above the bridge of your nose, then subtract another ten centimeters. The resulting number should be divided into two. The result is the optimal size of the lens, which is suitable for your face.

How to determine the size of the child's glasses?

Children are more difficult to seat to measure their facial parameters. In addition, these indicators are constantly changing, especially regarding the size of the bridge of the nose. The bridge in children's glasses is of great importance, because it is because of the constant change in its width that you have to change your glasses after a certain period of time.

Until the age of six, the size of the nose bridge varies little, and at seven or nine years the nose develops to its finite size.

To measure the main parameters that will be needed to purchase glasses, it is better to use the help of specialists or do it yourself during the sleep of the child.

Rules for the selection of glasses by size

In order to know how to correctly determine the size of points, you must follow several recommendations when performing basic measurements:

• The total width of the frame is defined as the sum of the bridge and the width of the two lenses, and the width of the hinge joints is added to them, with which the temples are attached to the frame of the rim. The number obtained as a result, as a rule, is in the range from four to ten millimeters.
• The total width of the eyeglass frame should correspond to the width of the face on which the glasses are selected and should not differ from the last figure by more than two or three millimeters.

Tips for buying points

It is best to purchase the described accessories in specialized stores or optics. In addition, experts recommend choosing famous or at least familiar brands and brands of glasses. And for this it is necessary to seek help from an optician-consultant, who is necessarily present in every decent store that sells glasses.

When buying glasses yourself, be guided by the size of previous, previously purchased.