Yes, as others have said, Windows comes with built-in accessibility features. Here are a few things you can do with Windows 7:
You can make text appear larger. To do this click on the Start button > click Control Panel > under Appearance and Personalization, click Adjust screen resolution > and choose the percentage of text size you desire (ie - 125% or 150%)
You can also use the built-in magnifier to make items on the screen appear larger. To do this click the Start button > click All Programs > click Accessories > click Ease of Access > and then click Magnifier.
Other ways to make the screen easier to see - http://windows.microsoft.com/en-us/windows7/Make-the-computer-easier-to-see-optimize-visual-display
Of course a larger monitor is always a good thing as well
Hope this helps!
Microsoft Windows Outreach