Refractive errors come in several types, commonly including myopia (nearsightedness), hyperopia (farsightedness), and astigmatism. Generally, these are the four main categories. Regardless of the type, the treatment methods for refractive errors typically involve the following: one method is wearing frame glasses to improve or maintain good vision. Another method is using contact lenses to achieve good vision. Lastly, corrective surgery, such as LASIK, can be performed to correct the vision permanently. These are the three basic approaches.