Overview: it has an effect.
1,materials
Inferior glasses their manufacturers are generally underground factories, no production and business licenses, the equipment is particularly rudimentary, which is the need to keep costs down. The lens resin is extremely impure, which can cause distortion of vision, and will produce a very large dispersion effect, which will make it particularly easy to visual fatigue. With low quality, you don't know when they will break and can cause eye trauma.
2, prescription
Inferior quality glasses do not care about the vision-related parameters of the person with the glasses, such as the pupil distance, such as astigmatism axis, such as the optical center of the lens. Usually when you get such glasses online, you just tell him the degree of the left eye and the degree of the right eye, and there is no way to match the most suitable eye with just two degrees, you can only make your degree deeper and deeper.
3, quality
Inferior glasses metal smelting process is very poor, and even produce radioactive elements. And if it is a child with glasses, these poor quality frames will affect the development of the bridge of the nose of young children. If these frames are particularly unsturdy and of poor quality, they are prone to break when hit, which puts the eye at risk, and eye trauma is possible.
Introduction:
Eyeglasses (glasses) are a combination of lenses and frames that are used to improve vision, protect the eyes, or for decorative purposes. Glasses can correct a variety of vision problems, including nearsightedness, farsightedness, astigmatism, presbyopia, strabismus, or amblyopia.