Nearsighted or farsighted? This MP3 has exactly the right frequencies and tones to bring the eyes back toward normal sight. Just use something that you can not really see and listen to the MP3 through headphones. So if you’re farsighted, then take a book to be able to read it better. If you are nearsighted, then look into the distance to notice when listening to MP3 that you can see step by step better again these objects.
This MP3 has only the pure frequencies in which just noises has been added, without music or additional tones.
This MP3 is best suitable for beginners and advanced.