A customer left a message to ask, “my frame legs are broken, can I buy a new frame to fix the glasses myself?” Generally not feasible! But not absolutely.
Many people have encountered a problem that their frame was broken , but the lenses were still in good condition. After all, it has cost much to find compatible lenses. They hope they can continue to use, I understand that people want to save money, or they just don't want to spend time and money on optometry and lenses.
Is it feasible to go to the optical shop to change the frame?
Let me explain to you. I will tell you if it works or not.
The essence of the spectacle frame is as I understand it: ask the optical center of the lens be fixed on an object in front of your pupil.
After changing the frame, any horizontal, vertical shift, or skew (with astigmatism) is not good!
1) If your lenses have been worn for 2-3 years, I suggest you can give up, because the lenses also have a service life.
After 2-3 years, the lenses are more or less worn out, and the optical performance is already very poor, which will damage the health of vision.
2) If your lens is new and not use very long, the lenses must be usable,the easiest way is to find a spectacle provider. If you want the same style of spectacle frame, you can put it on. It only takes a few seconds. Everyone understands such a simple truth. I have encountered it before. I didn’t take off my glasses when I was sleeping, and then they were crushed. Since it was new for less than a month, I went directly to the store and the boss replaced it with a frame of the same style.
Because the lens is the glasses that are processed according to the frame, this is the best policy and there is no change.
This will neither affect the interpupillary distance, nor affect the pupil height, nor affect the axis of astigmatism!
If the merchant indicates that this spectacle frame is out of stock, it is also possible that the agent or wholesaler has stock, so if you can wait a few days, I suggest waiting a few days.
If you have to replace other styles, the key point is to see if the position and width of the bridge is consistent with your broken frame.
That is, whether there is an offset in the horizontal direction.
If you have independent nose pads, try to find independent nose pads, because the presence or absence of nose pads has an impact on pupil height.
The pupil height of independent nose pads is often not very high, and the pupil height of integrated nose pads is often relatively high.
That is, whether there is an offset in the vertical direction.
If you need to grind it to install it, it depends on how many parts are ground down, whether the nose part is ground, if the nose part is ground down, will it make the lens shrink toward the nose, if it shrinks, it may affect the pupil away.
The point is: with or without astigmatism! With or without astigmatism! With or without astigmatism!
People with astigmatism need to take a more rigorous attitude towards changing frames.
Because the lenses has already been processed, secondary processing must generally be done by hand, not by machine.
Grinding by hand, your astigmatism axis may deviate. Especially some informal optical shops, I didn't realize it when grinding, or my technique was not good, and I didn't have the patience to slowly grind down the axis of astigmatism.
Anyway, customers don't understand, and there are still many customers to receive in the future, and it's over after grinding and taking them away.
As a result, you went back and wore glasses with off-axis position for several years! ! !
This is the worst worst worst case scenario. Be careful!
So what to do? I give you an idea:
You can find a more formal business, first check the original data:
Including interpupillary distance, pupil height, astigmatism axis! write down. Then explain that the processing master must pay attention to these 3 data. Different frames will have different pupil heights.
After the processing is completed, detect any changes in the data.
But in fact, even if the processing master has good skills and grinds seriously, these three data will still be more or less offset.
All we can ask is not to change too much,
Also let the merchant know that you understand better, don't fool me!
Conclusion: If you are not short of money, if the same model is out of stock, if you still have astigmatism, it is not recommended to change the shelf.
If you ask the processor according to my method, the processor will also say that there is no guarantee that no major changes will occur, and he can only do his best.
Everyone needs to know what's going on and understand this.
After all, no matter how good the technology is, manual grinding, the data really cannot be guaranteed to remain unchanged!
If you can use a good machine for secondary processing, it is also possible to achieve no effect. This requires good processing technology, a strong sense of responsibility, and good machines, all of which are indispensable.
You can check the data after it is done, and you can know whether it is accurate.
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