Adjusting the distance between the lens and the eye to the standard distance will result in a slight difference in visual perception between the new and old lenses, making discount eyeglasses online easier to adapt.

Old glasses may be deformed at the nose support of the frame, causing the lens to be too close to the eye. Due to the inverse relationship between distance and effective refractive power, the close distance between the lens and the eye can artificially cause the glasses to have too high a power, which can easily lead to visual fatigue.

The refractive power of the lenses of old and new glasses does not exceed the standard. Still, sometimes there may be differences in power, and sensitive people may notice slight differences in clarity.

Excessive correction of optometry or insufficient prescription of old lenses can cause dizziness. Increasing the prescription sufficiently will stimulate the retina more strongly, and when looking up close, the eyes will use more adjustment force than usual. Therefore, dizziness is a normal phenomenon, and after short-term adaptation, there will be no problem with the cheapest eyeglasses online.

For the first time wearing glasses, the objects seen are clear images that have been deformed and reduced because the nearsighted lenses are concave. The first-time glasses wearer may feel that this is different from the retinal imaging before wearing glasses, and may experience short-term dizziness, requiring some adaptation.

The distorted images seen by spherical lenses are more realistic than those seen by non-spherical lenses, and there may be differences between the images seen by spherical lenses. The brain needs to readjust, so initial dizziness may occur, which is a normal phenomenon and can be adapted to in the short term.