Especially for myopic users, it is best to have access to some essential data on the optometry sheet. When choosing discount eyeglasses online, it is important to pay attention to the selection of glasses frames. Choose a suitable glasses frame, which should be comfortable and attractive.

Mirror frames are designed to adapt to ergonomics in terms of comfort, but it still depends on the size and material of the frame. For example, if your nose bridge is collapsed or not straight, it is recommended to choose a mirror frame with adjustable lifting brackets.

Then pay special attention to the size of the frame, usually using the current frame as a reference to check the original size of the discount prescription glasses, usually marked inside the legs for measurement. If the original frame size is appropriate, try to choose a similar size and material.

If the above data has been worn out, it is recommended that you use a ruler to measure the comfortable glasses you previously wore and record the total width of the frame and the width inside the frame. The inner width of the mirror frame can be adjusted according to the actual wearing tightness.

There are two things to note about lenses. Generally, lenses are divided into single non and double non. Single non refers to single-sided nonspherical lenses, while double non refers to double-sided nonspherical lenses. Relatively speaking, dual nonlenses have curved edges on both sides of the lens, making the actual object clearer and less deformed.

The refractive index of glasses should be selected based on their actual degree. Ordinary glasses are thinner with higher refractive index lenses, not necessarily better with higher refractive index. The most important thing is that one sentence is appropriate.