Use icons along with labels. Icons should be simple and meaningful; text incorporated with the icon when possible.
The use of symbolic icons helps in the use of applications by older adults, essentially the older adults that present problems in reading. For better design it is recommended the use of simple and meaningful icons, followed by some text whenever possible.
An example of an application with labels and icons in hte buttons.
Healthcare TV Based User Interfaces for Older Adults, 2010
Designing touch-based interfaces for the elderly,2010
Design Principles to Accommodate Older Adults,2012
Design Recommendations for TV User Interfaces for Older Adults: Findings from the eCAALYX Project,2012
Accessibility,Content, Elderly, Graphics, Icons, Layout.