Today, most people use Rx to describable prescription that applied to eyeglasses. And rx eyeglasses are applied to people with poor vision caused by some vision problems like nearsightedness, farsightedness as well as prebyopia. For them they required prescription prescribed from eye doctor when they buying eyeglasses so as to get the proper rx eyeglasses for vision aids.
RX in eyeglasses means that you can put prescription lenses to the glasses frames. People who have vision problems, such as myopia, hyperopia, astigmatism and presbyopia, need prescription glasses to help correct their vision so that they can see things clearly. Eyeglasses which are marked with RX-able can be made into prescription eyeglasses. If you are choosing prescription eyeglasses, these glasses are available for you.