Why do I feel dizzy when wearing new glasses?

When people get a new pair of glasses, they always say that they are uncomfortable and unpleasant to wear. Why are they different from the glasses they wore before? Many people are therefore unwilling to buy new glasses and would rather wear their old ones. My new glasses are uncomfortable to wear, but when I checked them, I found that all the indicators met the requirements, such as axial deviation, horizontal deviation of optical center and vertical difference, etc. So what is going on?

Some people are sensitive to the phenomenon of dispersion, so they will feel uncomfortable when wearing lenses with a relatively low dispersion coefficient, which are usually called ultra-thin lenses. For these people, they can only give up beauty and choose lenses with lower refractive index and less dispersion (thicker). After all, health is more important.

The virtual image reflected from the inner surface of the lens is caused

This phenomenon usually occurs on lenses that are not coated with anti-reflection film. Because the reflected light reflects back and forth in the lens and then enters the eye, it will produce another very faint image, which will interfere with normal vision. In this case, it is better to wear coated lenses instead.

The problem of the tilt angle of glasses

The tilt angle of glasses should be 8-15 degrees. If the tilt angle of the glasses you wear is different from the original glasses or trial frames, you will feel uncomfortable.

Lens distance

That is, the distance between the lens and the eye is wrong. Generally, the distance between the lens and eye of the trial frame is 12 mm, so the glasses you wear should also be 12 mm, otherwise you may not be able to see clearly or feel uncomfortable.

Spherical aberration of glasses

This causes objects to appear distorted when you wear glasses. Just like when you look at something through a convex lens, the lines appear to become "concave"; when you look at something through a concave lens, the lines appear to become "convex". In this case, it would be better to use an aspherical lens.

Other impacts

1. The influence of lens material

Due to the differences in performance indicators such as refractive index, transmittance, and Abbe coefficient among materials such as white lenses, ultra-thin lenses, and resin lenses, the wearing effects will be different for the same refractive power. For example, some people feel dizzy when wearing ultra-thin lenses, but have no discomfort when wearing white lenses, but white lenses are easy to become scratched.

2. The influence of the height of the nose pad of the eyeglass frame on the visual effect The height of the nose pad can directly affect the relative position of the optical center and the pupil and the distance from the back vertex of the lens to the cornea, which also affects the actual visual effect.

For positive lenses to correct hyperopia, the effective refractive power of the lens for the eye increases as the distance from the back vertex of the lens to the cornea increases, and decreases as the distance from the back vertex of the lens to the cornea decreases. For minus lenses to correct myopia, the effective refractive power of the lens on the eye decreases as the distance from the vertex to the cornea increases, and then increases as the distance from the vertex to the cornea decreases.