Abstract: Compositions, devices, and methods related to determining adequacy of the application of a sunscreen composition on human skin are disclosed. A disclosed sunscreen composition includes a sunscreen agent and a fluorescent agent, which, when excited by an ultraviolet light having a compatible wavelength, fluoresces in visible light. A method for determining whether the sunscreen composition has adequately applied on human skin is disclosed. A disclosed device generates an ultraviolet light having a compatible wavelength and is portable.

Abstract: A method and system for entering numerical information in a manner that can be easily used by visually impaired individuals are disclosed. Using a touch screen display, for each digit of a multidigit number a first location on the screen is touched a number of times equal to the digit followed by touching a second location. Once all the digits have been entered, a third location is touched. This method allows for dividing the touch screen display into a small number of large area touch active regions, such as quadrants, thus reducing the accuracy required to enter a value since the large area quadrants are easily referenced to the screen boundaries. Further, audible cues are used to prompt the user as well as provide feedback.