Advice 1: How to choose glasses for vision

It is through the vision we receive a large flow of information about the world. The opportunity to see nature to us, but sometimes our eyes need help. Properly fitted glasses will help to solve many problems with vision.
How to choose glasses for vision
Instruction
1
The main error committed when purchased sunglasses in specialized areas: in the stalls, in the subway, with market stalls, railway stations. In this case, there can be no question of compliance with the optical performance, and continuous wear such glasses causes eye strain, deterioration of eyesight, headaches.
2
To choose glasses for vision need in stores that sell optics, or in specialized departments of large pharmacies. Generally there you will be able for a short time to be diagnosed and a specialist will help you choose exactly need glasses. You will be absolutely sure that all the main indicators of the lenses will be met.
3
Remember that the main indicator of class spectacle lenses is refractive index or index lenses. The higher the index, the smaller the curvature and thickness of lenses. That is, the spectacle lenses with a high index are lighter, not so distorts the eyes and facial features, it is easy to choose a stylish and thin frame.
4
Before how to choose glasses for vision, it is necessary to determine the choice of the material of spectacle lenses. Today it is glass and plastic and, by and large, it is impossible to give a clear preference for a particular material. Plastic lenses are very light, not as traumatic as glass, thanks to its resistance to splitting. Also the use of plastic provides more opportunities for processing and dyeing of lenses. The advantage of glass lenses is more high refractive index (the index) than plastic. Also lenses made of glass, more durable.
5
When choosing eyeglass frames pay attention to such characteristics as mobility nosophoros and size of the headphones. Nose pads should be soft, preferably silicone, and movable so as not to cause rapid fatigue under continuous wear. Ear pieces don't have to press very hard on whiskey and size you need to fit perfectly.

Advice 2 : How to choose the size of the glasses

In order to regain your vision clarity, to remove the eye strain, you need to choose the right glasses. And this is best done in the ophthalmologist's office. Note that when the wrong selection, you will not only worsen your vision, but also provoke headaches and even problems with pressure.
How to choose the size of the glasses
Instruction
1
First, you need to be examined by an ophthalmologist. A professional will diagnose, determine, what deviations from the normal view you have, and write out a prescription for those glasses that most accurately correct your vision.
2
Depending on what your habits and occupation, the same doctor will advise you lens coating and filters which will fit you the most.
3
With the help of computer diagnostics, you will choose the lenses and the rims that will suit you aesthetically.
4
The frame itself has 4 characteristics that you must consider when choosing.
The width of the bridge, the length of temples, width of the spectacle of the opening and the width of the rim. The sizes are usually indicated on the inside of the earhook. Typically, there are three figures. The first indicates the width of the opening. Further, after the dash or square icon, go to the bridge width and length of the headphones. You can measure your options and choose the frame with them. To do this you need to measure the parameters of the old glasses. If you are buying glasses for the first time, it is best to select helping you professional.
5
To determine the width of the face looking in the mirror, hold a ruler. For each ear to attach the pencils, they are the start and end points of measurement. Now, choosing a frame, keep in mind that the width should not be different from the width of your face more than 2 – 3 mm. Manufacturers frame width, as a rule, not indicated. But you can order eyeglasses over the Internet. And this size will be useful in case you are not able to try on the glasses.
6
The first value on the arc indicates the width of the opening frame. It is necessary for the proper selection of lenses. Focus on it when buying glasses. Note that in this case there are fluctuations in the amount of up to 5 mm.
7
The second magnitude or the width of the bridge is the distance between the eyes. You recognize her when you visit your optometrist. When selecting eyeglasses please note that the allowable deviation in the width of the bridge is not more than 1 mm.
8
The headphones find out the length by measuring the length of the temples old glasses. Measure the distance from the hinge to the end of the temples. The possible difference of 5 mm.
9
When choosing a frame, note that the arms do not squeeze the side of the head. And be sure to check the mobility nosophoros. They don't have to be tough and put pressure on the nose.
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