The short answer is: You must repurchase the same glasses frame to fit the original lenses, which means you can't just buy a new eyeglasses frame and have the lenses put in.
The fitting of eyeglasses, especially prescription eyeglasses, is a relatively complex professional operation that requires a series of steps, such as cutting and fitting prescription lenses based on each individual's different prescription parameters, combined with the chosen frame shape and size. It does not just fit the prescription lenses to the frame.
Individual Prescription
After a vision exam, the doctor will complete a copy of your prescription. This prescription includes a general description of your right and left eye vision and the type of glasses recommended.
The individual vision data section includes spherical, cylindrical, axial, and, for more complex cases, additive, prismatic and directional, near and far pupil distances, and other specialized data. Some of these data will be used to select and process the prescription lenses, such as the optical center of the lenses need to be shifted according to your pupillary distance so that the center of your pupil is aligned with the optical center of the lenses to achieve maximum vision correction and wearing comfort.
Shapes and sizes of eyeglass frames
As a carrier for prescription eyeglass lenses, frames are more than just a carrier. Depending on the match's requirements, the frame size needs to fit your face so that the corrective effect of the lenses is not compromised. Depending on the type of eyeglass frame, we must process the original round or oval lenses into the shape of the frame, so they can be fitted into the frame.
Therefore, not all shapes of edged lenses can be fitted to different frames; they need to be exactly the same shape to be possible.
Processing of lenses
Prescription eyeglass lenses, the most important part of prescription eyeglasses, take on the big responsibility of correcting vision. In addition to the processing of pupil distance data we mentioned above, it also includes different functions, such as different thicknesses and weights of lenses of the same luminosity in different materials, and different lens film layers will have different efficacy.
For the more complex ones, the alignment of the left and right glasses of the bifocal lenses, the preservation of the height of the near-use area, the selection of the channel of the progressive lenses, the processing and preservation of the astigmatism area, and other professional operations. According to these edged lenses, if you change to a different frame, it is necessary to edge and install new lenses.
Shaping of glasses frame
The shaping of eyeglasses is significant. The final step in completing a prescription eyeglass is shaping, which determines whether the eyeglass is comfortable to wear. The shaping involves determining whether the legs of the frames are at the same level, whether the curves of the frames are consistent, whether the rest leaves are balanced from side to side, and whether the distances are within the standard range. All these operations must be performed at the end of the lens fitting and are not solved by simply replacing the lenses.
With the above-detailed description, we can clearly understand why it is not possible to replace the original lenses with the new frames; even the same glasses frames need to be professionally operated. We recommend buying cheap glasses online. If you're strapped for cash but need to replace your glasses, you can get new prescription glasses for even a quarter of the original price but the same quality.
