<b>How can I know if GYENNO is useful for me?<br> <b>GYENNO is suitable for Parkinson's patients whose hand vibration amplitude is less than 7cm. If you have difficulty eating because of hand vibration, there is a test below that can be used to quickly detect whether GYENNO can help you eat better.<br> <b>1. Please go to GYENNO's official website to download the test page and print it on A4 paper.<br> <b>2. Use a tool to hollow out the shadow area on the test page to form a circular hole.<br> <b>3. Two assistants are required to straighten the page and make it perpendicular to the ground. The patient with shaking hands holds a chopstick and keeps the hand as close to the circular hole as possible, and tries to align the center of the circle for more than 20s;<br> <b>4. Observe the shaking amplitude of the patient with handshaking: If the chopsticks can be kept within the range of the circular hole most of the time, it means that GYENNO is suitable for this patient. *If the chopsticks often hit the border of the circular hole, it means that GYENNO is not suitable for this patient.<br>