Many people with presbyopia will wear presbyopia glasses. In order to save time and convenience, some people ask the stall owner to recommend a pair according to their age. Some people choose to go to regular optical shops, others to hospitals, and some to special presbyopia optometry centers. Then, are the reading glasses you bought suitable? Is this a good choice for you?
Many people don't know this. After wearing new reading glasses, they will feel uncomfortable, dizzy, tired, unable to see clearly, and feel tired. I just want to close my eyes, not open them. So, how to judge whether your old reading glasses are suitable? Now, let's listen to super vision!
Weight of glasses：Although the glasses worn on your hand are not heavy, some heavy glasses will hurt your ears and nose if worn for a long time. Have a strong sense of pressure. After a long time, there will be deep indentation, and there will be obvious redness and swelling at the indentation.
Therefore, wearing light and light pressure is also one of the criteria to judge whether it is appropriate. Generally speaking, now we choose resin lenses and alloy glasses frames, which are light in weight, light in pressure and high in comfort.
The optical center of the lens (the optical center of the lens) must be located at the geometric center of the lens. The lens part outside the optical center has the function of prism, so the optical center must be located in the middle of the lens. The distance between the optical centers of the two lenses and the distance between the two pupils must be the same, which requires the proper size of the lens frame. After wearing, the pupils of both eyes should face the optical center of the lens.
If the optical center deviates from the pupil, the glasses will also produce prism effect, causing diplopia, headache and other symptoms, which is unfavorable to the eyes. The farther the optical center is from the pupil, the more likely and serious this visual fatigue is. The lens shall be free of glare, scratches, bubbles, particles, etc. Firelight refers to the uneven refraction of the lens due to uneven surface or inconsistent internal optical density during lens processing.
Everyone has different eyes. Many finished glasses have two lenses of the same degree. Of course, it applies to people with the same vision. But most people have different degrees of eyes. Although they feel very clear when trying on site, they will find problems after a long time. Some people wear reading glasses more and more tired. The more they wear, the worse their headache will be. In fact, this is caused by inconsistent degrees, or the degree adjustment does not conform to the actual situation of the eye.
Nowadays, frames are mostly made of titanium alloy, and plates and other metals are not uncommon. The frame is easy to clean and the parts are of high quality, which is not easy to corrode and deform. In fact, this is a good frame. In addition, it is not too tight, but loose, easy to wear off and not easy to fall off, which is also the standard of suitable size.
When trying to wear reading glasses, look at the visual acuity chart and various objects at a distance of 5 meters, and observe whether the line of sight and object image are deformed after wearing glasses, whether the object image beats when walking and turning around, and whether there is dizziness, nausea and other discomfort. Only when you feel clear and comfortable when wearing glasses can you get a pair of qualified glasses.
If it is equipped with a new type of reading glasses, it will take some time to adapt. At the beginning of this process, I adapted to sitting first, and a few days later I adapted to walking. Don't wear it upstairs or downstairs at first. It's easy to get dizzy.
Despite these judgment methods, many people do not show obvious discomfort after wearing unqualified glasses. In fact, humans have strong adaptability, but wearing unqualified or inappropriate reading glasses for a long time will also cause cumulative damage to the eyes, so it is best to go to the super vision center for a comprehensive examination of the eyes, so as to fundamentally make no mistake.