Every person who wears the cheapest eyeglasses online seems to be opening a blind box after receiving the package. Whether you are satisfied or not depends entirely on luck.
So, is eyeglass online really reliable? What are the points to pay attention to at the same time? Is the optometry certificate not a prescription for glasses?
Simple optometry data cannot be used as a prescription for glasses. Professional optometry institutions will analyze and modify the results of visual function tests after optometry.
For example, we are correcting for myopic exotropia with foot correction, under-correction for esotropia, and modifying the refractive power of glasses for esotropia. Adjusting for leading and lagging is also a factor in modifying the refractive power of glasses, and comparing the parameters of new and old glasses is also a factor in modifying the refractive power of glasses.
Only by meeting the basic requirements of comfort and clarity can glasses be effectively protected, and glasses are not as simple as providing diopter and pupil distance.
In addition, some people, to save time, check and match new glasses according to the degree of their old glasses when shopping for eyeglasses online. Even if the degree of myopia or astigmatism in adults does not increase significantly, the axis of astigmatism may also change. Therefore, every time a new lens is replaced, one must first undergo an optometry to determine a new prescription.
Moreover, the parameters of the new frame are different from those of the old frame. If the parameters of the old frame are strictly followed, even if the same degree remains unchanged, there may be discomfort. That's why some people, whether they are shopping online or wearing glasses in physical stores, may still experience discomfort while maintaining the same level of glasses.
