If you lose your eyebrows or find that they are thinner you can redraw them with an eyebrow pencil that matches your normal hair color. Eyebrow pencils are available from any chemist or beauty shop. Beauty counters in department stores can show you how to redraw your eyebrows as it can be daunting to try this at first if you are not used to it.
To make the eyebrows as realistic and natural looking as possible follow the natural eyebrow arch and draw in short feathery strokes to look like the normal eyebrow hair. Make the brow thicker on the inner end of the eyebrow (nearest to the nose) and thinner at the outer edge.
You can also use false eyebrows. They need to be fixed with special adhesive, which is available from the false eyebrow suppliers. Special solvent is used to dissolve the adhesive and remove the eyebrows.
False eyelashes can be used to give a natural appearance. These are available from many beauty departments along with the adhesive that is used to attach them. Many department stores have private rooms where staff can show you how to apply the eyelashes.