Wondering if you can replace just one lens when it's broken or scratched? Here's what you need to know.
For glasses that have been used for over three months, it's not advisable to replace only one lens. New and old lenses of the same type vary in light transmittance and wear. Replacing just one lens will lead to different levels of clarity and comfort for each eye.
Moreover, the coating of a worn - out lens is damaged to some extent, which impairs its functions. As a result, it can no longer protect your eyes as it did before.
Lenses also age and have a limited lifespan. Generally, well - maintained branded lenses can last about two years. Even high - end foreign brands may age after three years, causing color differences and changes in refractive index, thus affecting visual quality. So, even if the lens isn't broken and the prescription is still right, it should be replaced.
However, if your glasses are brand - new or have been used for a short time with minimal wear, replacing just one lens is acceptable.
Since there is no Chinese content in the original article, no translation is needed. And there is no information related to China, so no replacement of relevant information is required. The article already uses English punctuation format.
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