Can you put new lenses in old frames?
In the previous article, we discussed “How long do plastic glasses frames last?”. In this article, let’s talk about “Can you put new lenses in old frames?”.
Eyes, glasses, and the frame are closely related.
In order to optimize the optical properties of the reprocessed glasses, the following alignment data will be recorded during lens matching. The distance between the center of the pupil and the center of the lens frame. The distance between the lower edge of the frame and the center of the pupil.The distance between the back surface of the lens and the most anterior point of the cornea.The angle between the surface of the lens and the vertical line of sight, and the horizontal line of the surface of the lens, and the angle of view between the two (curvature). Only in a few cases can an old custom lens be installed on the new frame. In the case of standard focusing lenses, the option of putting the old glasses in the new frame is most likely to work, as only the distance between the pupils is needed. In the case of a standard single-focus lens, the remaining alignment data is usually not needed.
Replacement of glasses frame is needed.
If we don’t want to change the lenses, but just want to change the frames, there is a very important requirement — the frames must be the same size, or the frames must be smaller. Since the size of the lens is already fixed, it is not possible to replace it with a large glass frame. So if you really don’t want to change the lenses, then at least make sure that the frame is the same, or wearing the glasses will be affected.
The state of the lens should be paid attention to.
Replacing the lenses or frames is not recommended. Try to replace the entire lens. The situation of the lens affects that whether it can continue to be used. If the new frame is really damaged, we can directly replace the frame and use the same frame, to ensure the effect at least. If the lens has serious scratches, or yellowing, oxidation, and other problems, then the lens will definitely be replaced at the same time. Lenses should not be badly scratched, since readjustment will put more strain on the surface of the lens, which will make the film of the old lens less durable.
The comfort level is not high.
The old lens is installed on the new frame, first of all, it is difficult to do. Even if they are reluctantly installed on the frame, a lot of optical systems of the lens will change, pupil distance, optical center, and so on. In addition, for people with astigmatism, it is even more impossible to change, because astigmatism has an axial position. If you polish your original lens, the axial position will change, and it will be more uncomfortable to wear. This is especially problematic if the older lens is a progressive lens. In this situation, the tolerance is even more limited because the progressive lenses have to correct nearsightedness, farsightedness, and presbyopia all at the same time, and achieving a clear vision of all distances between them. And the small error can make you uncomfortable to wear.
Thank you for your time in reading our passage “Can you put new lenses in old frames?”. For more information about sunglasses, please continue to follow post.koalaeye.com. Also, it is welcome to share and forward to Facebook and Twitter.