Recently, I received a message from a follower who asked, "My glasses have scratches, what should I do? Do I need to replace the lens with a new one...?" I thought very seriously and answered his question. Let's take a look together.
What are the dangers of lens scratches to the eyes?
Numerous scratches on the lenses can reduce their light transmittance, resulting in blurry and dim vision. Without new lenses, it can lead to visual fatigue.
Viewing things with scratched lenses can cause eye adjustment and lead to symptoms such as dryness and discomfort.
Wearing glasses with scratches for a long time can easily cause an increase in prescription, especially for young people.
After lens scratches, it is more likely for the lenses to delaminate, causing inaccurate prescription. Furthermore, delaminated lenses can weaken their protective functions such as blue light and UV protection, making it unable to block harmful light from entering the eyes.
Do scratches on any part of the lens have an impact?
First of all, it should be acknowledged that any scratched lens will definitely affect vision, only the extent of the impact varies. If the scratches are on the lens edges, which are not the area frequently focused on, it will at most affect clarity when the eye focuses on the scratched spot, without causing significant harm to the eyes.
If visible scratches happen to be located at the optical center, it will always feel as if something is blocking the vision and create discomfort. The impact of such lens scratches will be greater. The most serious are those small, numerous, and evenly distributed scratches (often caused by careless cleaning with improper materials). These scratches can cause changes in refractive power, reduced light transmittance, loss of coating functionality, resulting in unclear vision or a foggy effect.
After reading this, should you immediately take off your glasses and check if there are any scratches on the lenses? If not, congratulations! However, still remember to cherish and maintain your glasses properly. If there are already scratches, according to the information above, you should judge for yourself whether it is necessary to replace the lenses as soon as possible!
Proper lens maintenance methods:
Clean with water and then wipe when dirty; if there is grease, you can add a little neutral detergent, rub gently with fingertips, rinse with water, and then wipe. Avoid wiping the lenses directly with dry tissues or lens cloths.
In fact, eyeglass lenses also have a lifespan. Even in top brand lenses, with good maintenance, after wearing them for about 2 years, they may turn yellow due to long-term oxidation, resulting in reduced clarity and light transmittance. If you have been wearing your lenses for 2 to 3 years, even if the scratches are not severe, I suggest you have an eye examination and consider replacing the lens.