If you are a young person who uses your eyes a lot, you may also need to have a dilated eye exam to get a relatively accurate myopia. The results of the optometry can be used to try on glasses, usually from the trial frame glasses to start, is for the frame glasses fitting a set of process, is possible to follow this process first frame eye prescription, to get a comfortable look at things have a clear frame eye prescription, you can carry out contact eye neck number of conversion. Usually, for myopia below 400 degrees, there is usually no need to convert, if it is above 400 degrees, it can be reduced by 25 degrees, above 500 degrees it can be reduced by about 50 degrees, and above 700 degrees it can be reduced by about 75 degrees. Also if the patient has astigmatism, you can first consider increasing to spherical lenses to see if you can improve your vision. If it is not obvious to improve vision completely with spherical lenses, you will need to try toric contact lenses to do so.