By the principle of the vibration of the ultrasonic transducer, the deposits on the surface of the lens will be thoroughly cleaned off without touching them with your hand. It is most safe yet eddective method to clean them with your hand. It is most safe yet effective method to clean them. The ultrasonic cleaner will rinse, purge and sterilize them simultaneously. The creative achievement of the high technology brings out the best maintenance for the contact lenses.