The distance between the eyes can affect the effective power of the discount prescription glasses lens, meaning that the farther the distance between the eyes, the lower the effective power.
The farther the distance between the eyes and the mirror, the greater the distortion of the corrected visual quality, which will increase the surrounding deformation area, narrow the comfortable visual range, and cause blurred vision, and a strong shaking sensation.
So my suggestion is, without affecting the comfort and aesthetics of wearing, without affecting the up and down movement of eyelashes, and without affecting the fogging of discount prescription glasses lenses, the smaller the distance between the eyes, the better, and the higher the final clarity and visual quality.
The high point of the pupil should not be too high. The high point of the pupil refers to the distance from the bottom of the frame that the eye can see through the lens after wearing glasses.
If the high point of the pupil is too high, it will cause the bottom of the processed lens to be thicker, the optimal visual area to be reduced, and some may even have blurred vision, resulting in a poor wearing experience. It is necessary to frequently look up or increase the frequency of pushing up the glasses, which will increase the fatigue and burden on the cervical spine.
The appropriate pupil height area is generally in the upper three-quarters of the middle. The high point of the pupil referred to here is a reference for wearing regular single-focus lenses, as well as a reference for general wearing habits.
If you are using functional lenses, such as multifocal lenses, the significance of these pupil height references is not significant and needs to be determined based on individual circumstances. It is recommended to listen to the advice of professionals best place to buy eyeglasses.