Talking to Patients on Sunscreen Application and the Effects of Visible Light

An expert discusses how an important part of personalized photoprotection is providing instructions to patients on how and when to apply and reapply sunscreen. It is advised that sunscreen be applied 20 to 30 minutes before going outdoors. It is critical for patients to reapply sunscreen every 2 hours or 4 times a day, depending on the length of time the patient is outdoors.