Annual Health and Safety Fair. The Derma Scan is a simple box that uses ultraviolet (UV) light to show sun damage that is invisible to the naked eye. It is NOT a skin cancer screening. Remember, even a suntan is harmful.Tanning (under the sun or in a tanning bed) is an outward sign of internal skin damage. Long-term exposure to the sun and tanning booths contribute to the risk of developing skin cancer. Prevention is the key to preventing skin cancer. Melanoma is the most deadly form of skin cancer.nnual Health and Safety Fair. The Derma Scan is a simple box that uses ultraviolet (UV) light to show sun damage that is invisible to the naked eye. It is NOT a skin cancer screening. Remember, even a suntan is harmful.