Problem with changing the screen resolution to something other than the native resolution of your display (assuming that it's LCD) is that you will get fuzzy blocky text, (albeit larger) which doesn't help much if you have poor eyesight!
A much better idea is to change the DPI setting:
Right-click desktop
Select Properties
Go to the Settings tab
Click Advanced
Change the DPI Setting from 96 to 120 (or you can choose a custom setting)
Click OK
Click OK again
You may need to restart your computer.