Ultrasonic lens cleaning is a method used to clean eyeglass lenses and other optical surfaces using ultrasonic waves. This process involves placing your glasses in a tank filled with a cleaning solution. An ultrasonic cleaner generates high-frequency sound waves, creating tiny bubbles in the liquid which when they implode, produce a scrubbing action that removes dirt, grime, and smudges. This method is effective for reaching into small crevices and removing contaminants that traditional cleaning methods might miss without causing any harm to your pair of glasses, or sunglasses.