Because the lens is processed based on this cheapest eyeglasses frame, it will not affect the pupil distance, pupil height, or astigmatism axis!

If it is necessary to replace with another style of discountglasses, the key is to check whether the position and width of the center beam are consistent with your damaged frame center beam. That is, whether there is displacement in the horizontal direction.

If you have an independent nose support, it is best to find one, as the presence or absence of a nose support can affect pupil height. Independent nose supports often have lower pupil height, while integrated nose supports often have higher pupil height. Is there any deviation in the vertical direction?

If it needs to be ground before installation, it depends on whether the ground part is more or less, whether it is the nasal measurement part. If the nasal measurement part is ground, will it cause the lens to shrink towards the nose? If it shrinks, it may affect the pupil distance.

The key is whether there is astigmatism! No astigmatism! No astigmatism! People with astigmatism need to approach changing frames with a more rigorous attitude. Because the lenses have already been processed, secondary processing must generally be done manually and cannot be done by machine.

By hand grinding, your astigmatism axis may deviate. Unconscious or with poor skills during grinding, lacking the patience to slowly grind down the astigmatism axis.

What should we do then? You can find the best place to buy eyeglasses and first check the original data including pupil distance, pupil height, and astigmatism axis! Different frames have different pupil heights themselves. After processing, check for any changes in the data.

But in fact, grinding very seriously can also lead to some degree of deviation. What we can demand is that there should not be too much change.