Why not buy eyeglasses online?
In general, buying the cheap eyeglasses is easy thing, but if you want to buy a pair of the most comfortable eyeglasses, so you need to consider many factors. When you order eyeglasses online, because of every pair of glasses is a custom-made item. There are not only different designs and materials of both frames and lenses, but also everybody’s head and eyes are different. So you must take various measurements for protecting eye health.
At the beginning, the most online eyewear providers feature the frames in detail. You can look for each available color and read a description of the features, such as what frame material they’re made of (as: plastic or metal), and whether they have spring hinges.
Secondly, the accurate PD measurement is necessary to ensure the correct positioning of your lenses within the frame you have chosen. There is a guideline, which is most adults PD are between 55-65mm (2.2-2.8) inches and most kids PD are between 42-54mm (1.6-2.1 inches). The optical center of eyeglass lenses is the part that gives you the truest vision, and it should be directly in front of your pupils. To determine how to place the lenses in your frames so the optical center is customized for your eyes, the eyeglasses lab needs to know the distance between your pupils, or PD. If you do not have PD in your prescription, please contact your optometrist or your doctor. Due to this measurement is used to accurately center the lenses in the frame that you have selected, which will also affect the comfort of wearing eyeglasses.
Also, in order to wear the comfortable eyeglass frames, to decide the frame size, the most important measurements are the total width (which is distance from temple to temple) and temple length. By selecting frame with similar measurement, it will fit you perfectly. You could measure the total width of your face (from one temple to another side) to make sure the frame you ordered will fit you well.
Finally, if the eyeglass frames you chose are too large or that don’t fit the bridge of your nose. You will not only feel uncomfortable, but also you may have a headache. Meanwhile, if too small, they can pinch your head and leave the side of head red marks by the temples. Make your eyeglasses more attractive and more comfortable, especially if you have a strong prescription. Remember the above suggestions, and then you could get the most comfortable but still cheap eyeglasses at online.