The factors that determine the quality of optical glasses

With the popularization of electronic products, more and more people suffer from myopia, we can see eyewear shops everywhere when we walk on the street. Now there are many myopia frames with different materials. For example:metal optical, titanium optical, and the expensive buffalo horn optical and wood optical, etc., There are a lot of choices for us. It is easy to choose the shape of eyewear. Just take a look, try it, the style and color should macth your face shape, but for myopia glasses, you should pay more attention to it. Summarize the following factors that determine the quality of optical glasses, I hope it will be helpful to you.1.Myopia degree of the lens. How to match the myopia degree of the lens more appropriately is the most important point in the lens matching process.Our optometry principle is the clearest state of the lowest degree. The most common way is to judge whether the focus is on the retina according to the different wavelengths of red and green.Show the red and green test marks. If you look at them with a single eye, the figures in green or red are clear. The figure in red is clearer, indicating that the focus is still before the retina(under correction), the figure in green is clear, indicating that the focus is behind the retina (over corrected). The figures in red and green are clear that indicates the focus is on the retina (Best correction). At the same time, check the vision function together and optimize the prescription according to the actual situation.2.Astigmatism degree and axis. This is particularly important for patients with astigmatism.The principle of astigmatism correction is to achieve the best correction.The astigmatism can be simply understood as:on the basis of myopia, there is an additional degree in a certain direction. For example, -1.00-0.50*180, the direction of the 90 axis is -1.50, and the other directions are -1.00. This is why the astigmatism should achieve the best correction, and we also understand the importance of the accuracy of the astigmatic axis.However, some patients with astigmatism need to have a adaptation period for the first time wearing glasses. In the long run, astigmatism still needs to be corrected. If the astigmatism is uncorrected, which means that everything is double,which is one of the causes of visual fatigue.In order to ensure more accuracy, the cross cylinder should be used to fine adjust the astigmatic axis and degree under the condition of best correction or slightly over correction.In fact, there is still a lot of knowledge about glasses.And after many years in the field,I have only known some basic knowledge.It is indeed necessary for consumers to do their own homework, but it is unrealistic to have a deep understanding through doing their own homework. Besides mastering some professional knowledge, the most important thing is to find a formal professional glasses shop and let professionals help you solve these problems. They will not only suggest what type of glasses you are suitable for, such as acetate optical, metal glasses or titanium glasses, full frame glasses, half frame glasses or rimless glasses, but also, most importantly, give you a lot of professional advice on glasses. It is very important to protect your eyesight.

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