This is the "Fukutsuji-style Vision Improvement DVD 3-Disc Set (Theory, Monitor, Practice)". This DVD set systematically teaches a vision improvement method based on the principles of traditional Chinese medicine, from theory to practice. • Theory: Explains various factors related to vision, such as peripheral muscles, the eyeball, the cervical spine, and organs. • Monitor: Shows real changes and effects through footage of practitioners. • Practice: Carefully introduces easy stretches and training methods, taking only 5 minutes a day. Playback has been confirmed after purchase. There are no noticeable scratches on the DVDs or damage to the cases, and you can use them without any issues. Shipping: • Immediate purchase OK (no comments needed) • Will be carefully packaged and shipped via Nekopos, etc.