The discount prescription glasses can provide good corrected vision for people with refractive errors, which is their biggest advantage, as they can see things clearly when worn.

But his shortcomings are as prominent as his strengths, with many imperfections, and professional fitting is the process of finding perfection from imperfections.

Frame discount prescription glasses, are something you must know. The aberration of the lens, myopic lenses are concave lenses, and their physical characteristic is that they will shrink when looking at things, and the higher the degree, the more obvious it is.

When fitting glasses, it is necessary to ensure that the pupil and the optical center of the lens are aligned. However, even so, because the eyeball rotates in daily life, it is inevitable to see things through the eccentric area, which can cause distortion and deformation when looking at things. The more the line of sight reaches the edge, the more obvious the deformation becomes, and the shaking sensation when turning the head back and forth is the main problem of feeling dizzy when wearing glasses.

Even the best visually optimized lenses cannot completely avoid this problem. If you want to minimize the distortion of looking at things, the best solution is to choose a smaller frame (with the center of the frameset close to the pupil distance) and grind off the excess eccentric area.

Choose visually optimized discount prescription glasses lenses, such as free-form surfaces, eight-axis lenses, double nonlenses, and so on. Choose lenses with a suitable refractive index to ensure thinness as much as possible, which can minimize the distortion when looking at things.

What is dispersion? Visible light is divided into seven colors, and dispersion occurs as long as it is refracted through a medium. Excessive dispersion is manifested as unclear contours around the object and a feeling of small rainbows.