"Controlling the brightness of the computer or laptop screen will help have a better visualization and produce less tireness on the eyes, making it easier to work on the computer.If you have a Personal Computer, then look on the buttom or on the sides of your monitor for a button that has sun type figure. There can be two buttons with this figure and the function of these is to control the
. brightness of the screen. One button will lower the brightness and the other will increase it, when you locate this one, press on it several times until the brightness increases enough for you to see correctly.If you have a laptop, you must look for a button on the left bottom side of the keyboard that has a ""Fn"" in dark blue, after locating it, look for two other buttons on the top that has figure like a sun that is also in dark blue. These bottons can be on the ""F"" buttons, the F5, F6 or F7. If its no there it could be on the arrow buttons that are on the bottom right of the keyboard. When you locate all these buttons, press in ""Fn"", holding it down, press on the other ""F"" button or on the ""arrow button"" that will increase the brightness, repetitively until is bright enough for you."