Why do I use the same lens, but the lens below can see better?

1, your myopia has deepened and you need new glasses.

2. The power (diopter) of each position of the lens is different, and your lens power is up and down.

In detail, as shown in the figure, after the light emitted by the luminous point A passes through the refractive surface (lens), the edge light deflects greatly, and the paraxial light deflects slightly.

For your lens, the original incident refraction point is closer to the center and the power is small. After rotating up and down, the refraction point at the entrance becomes the original lower end of the lens, which has a large degree and strong refraction ability, which can effectively correct your eyes with deepened myopia. So you think you can see it clearly by turning it up and down.

What should I do?

If the glasses are not suitable, it will lead to dizziness, headache, nausea, visual fatigue, increased myopia and so on. Glasses must be accurate to control the increase of myopia, relieve eye fatigue and correct myopia.

So please re-optometry glasses as soon as possible.

Optometry is optometry. If the patient has ametropia, such as myopia, hyperopia, astigmatism and presbyopia, optometry is needed, and pseudomyopia can also be ruled out by mydriasis optometry. Different optometry methods are suitable for different age stages, as follows:

1, mydriasis optometry after cycloplegia: generally suitable for children under 12 years old because of their strong self-adjustment ability;

2. Rapid mydriasis optometry: generally suitable for teenagers over 12 years old, and can get more accurate refractive power;

3, obvious optometry: suitable for adults aged 30-40, this way does not require mydriasis, you can directly prepare suitable glasses through the examination of the optometrist.

Finally, the optician makes medical glasses according to the actual examination data given by the optometrist. The same prescription, due to the different professional level and equipment of opticians, the effect of glasses prepared may be very different. Therefore, it is very important to choose a professional hospital to make glasses.

? Personal experience: If financial resources permit, choose imported lenses, such as Essilor, Zeiss and Nikon. High-quality lenses can effectively protect the fundus. It doesn't matter if the frames are made in China. The lens of the same brand, the larger the diameter, the better the picture quality.