If the distance between the pupils of old glasses is wrong, there is no way but to adapt. If there are problems with the processing of new discount prescription glasses, it usually results in small rainbows, ghosting, varying heights when looking at things, and a pulling sensation on the forehead.
The problem of the visual function of the eyes is quite complex, including internal and external oblique, upper and lower oblique. For example, implicit oblique, if the degree of the eyes is appropriate and the eyes can merge images when viewed closely, you will not feel obvious eye fatigue.
But if the degree of myopia is too corrected when looking up, the eyes will use more adjustment, which will increase the implicit deviation of the closer view, and at this time, eye fatigue may occur.
You need an optometrist to solve this situation, but many optometrists still cannot solve the visual function problem, and can only find an optometrist who can solve the visual function problem to solve it.
For example, if you wear your cheapest eyeglasses crooked, one side should be high and the other side should be low. At this time, when you look at something, there will be a shadow of two figures, one above and the other below. This is the feeling when the pupils are high, high, and low (the upper and lower lobes are too oblique).
All new things have a normal adaptation process, just like when you buy a new pair of shoes, you still need to wear them for two days, and when you buy a new phone, you also need to get used to them for two days.
The discountglasses are even more so, but adaptation should be done at least under the premise of the appropriate degree of glasses.