Nail polish curing device (IMAGE) University of California - San Diego Caption Three cell types were exposed to two different conditions: acute exposure and chronic exposure to the UV light device, pictured here. Credit David Baillot/ UC San Diego Jacobs School of Engineering Usage Restrictions none License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.