This invention relates generally to methods and apparatus for utilizing energy, e.g., optical radiation, to treat various dermatological and cosmetic conditions. A handheld dermatological device that facilitates viewing and measuring parameters of a treatment area before, during, and after application of a treatment modality, and methods of use therefor, are disclosed. The device can include a deflective device that can steer radiation to control a target position of the radiation. The device can also include a control device to allow a user to control the radiation through manipulation of the deflective device.