First of all, it must be confirmed that any scratched cheap eyeglasses near my lenses will have an impact on my vision, it's just a matter of the degree of the impact.

If it is the edge of the lens, not the area for long-term focusing, then at most it only affects the ability to see clearly when the eye focuses on the scratch, and will not cause too much harm to the eyes.

If the scratch is visible to the naked eye and happens to be at the optical center, then you will always feel that something is blocking there, making you feel uncomfortable. Of course, the impact of this type of lens will be even greater.

The most serious ones are those small scratches, which are very numerous and evenly distributed (mostly caused by not paying attention when wiping glasses and wiping everything with them). These types of scratches can cause changes in refractive power, a decrease in transmittance, loss of membrane function, unclear visibility, or a hazy appearance.

Therefore, for discount eyeglasses online lenses with obvious scratches, it is recommended that you replace them promptly! So, can glasses without obvious scratches and well-maintained be used for a long time? The answer is: NO! NO!NO!

Having a lot of scratches can reduce the transmittance of the lens, causing blurred and dull vision. Without new lenses, things can be seen clearly and transparently, which can easily lead to visual fatigue. Unclear vision can trigger eye adjustment, as well as cause dryness and discomfort in the eyes.

Wearing glasses with scratches for a long time is more likely to lead to an increase in prescriptions, especially for children's eyeglasses. Scratches on lenses can easily lead to lens detachment, resulting in inaccurate prescription and affecting the protective function of the lens.