Many people wear eyeglasses online and don't care if one eye is blurry, which can be very harmful to their visual health. Binocular regulation is controlled by the central nervous system, and the human eye is always lazy, choosing lower regulation.

When calculating the displacement, please ignore the frame. Although the frame determines the distance between the lenses, what we should measure essentially is the distance between the nasal edge of the right lens and the Nie edge of the left lens, which is the pupil distance of the frame, that is, the horizontal distance between the geometric centers of the lenses.

And it needs to be measured on the horizontal line where the pupil height is located. It's okay to touch the metal cheapest eyeglasses frame, but if the measurement of the thicker material part of the plate frame is incorrect, then the pupil distance during each process is incorrect, and even the best machine is in vain.

It is not recommended to choose a mirror frame with a very soft center beam component, especially for those with a large head. After wearing it, the legs of the mirror should be extended and stretched outward, giving the frame an outward force. This can easily cause the eyes to scan the edges, causing dizziness, shaking, and deformation.

The main source of weight for high myopia discountglasses is the lens, so there is no need to be too concerned about the weight of the frame. The focus should be on how to reduce the thickness and weight of the lenses. If the frame is chosen to be extremely light, the material is often very thin and the legs are very thin. After the lens is installed, it is easy for it to slide down and become unstable, which is very distressing. And it is very detrimental to the stability of vision.