The first is optometry. Ask a professional optometrist to test with a computer instrument, and then recheck with an eye chart to determine its accuracy. If there is astigmatism, it must be added. (Cheap Eyeglasses)
When you can’t see, it can reduce the pressure on your eyes. How often should you change your new glasses? Optometrists recommend updating your prescription every two years or earlier, if needed Cheap Frames Online.
Then select the lens according to your degree. If your degree is not very high, below 400 degrees, you can generally match with resin coated anti radiation lenses with refractive index of 1.56; If your degree is slightly higher than 600 degrees, you’d better have an aspherical lens with a refractive index of 1.56. The imaging of this kind of lens is relatively good, the surface of the lens is relatively flat, there is no difference, and the vision is relatively clear. Discount Glasses Online is a best choise.
If your degree exceeds 800 degrees, you’d better match its refractive index to 1.67 or 1.74. Such a lens is thin. After wearing it, Cheap Glasses Frames will be lighter and more beautiful. There is also the choice of a slightly smaller framework, so the effect is better.
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