There are many reasons for improving visibility in SolidWorks, for example if you wear glasses or if you’re giving a presentation in SolidWorks.  As a Certified SolidWorks Instructor, I use the following settings that I am recommending to you.

My recommended SolidWorks settings are:
Set larger icons for easier identification under Tools/Customize/Toolbar Tab, select the Option Large icons.

Make your previews pop on screen, as the default yellow can be hard to see, from Tools/Options/Colors> Temporary graphics, select the color:

When using Shaded with edges display mode, know at a glance if the faces of a model are tangent by adjusting Tools/Options/Display/Selection: Part/Assembly tangent edge display, select the option As Phantom.

My recommended Windows 7 Settings:
From a Right Click on the Windows Desktop, you can select ‘Screen Resolution’, and the resolution can be adjusted to your preference.  However more importantly on this same dialog, there is another option, called ‘Make text and other items larger or smaller’; that allows you to adjust the scale of the screen fonts.  So for Windows and every program in Windows, all text fonts shown for menu’s and pull down’s will be larger regardless of your screen resolution.

To make your mouse cursor stand out I recommend making it larger and black, find this setting in
Control Panel\Ease of Access\Ease of Access Center\Make the mouse easier to use; or from the Mouse Properties Pointers Tab.

And finally make it clear when selecting dialog box items through the Control Panel/Appearances and Personalization/Change window colors and metrics, Change the colors for both ‘Selected Items’, for the current Selection, and ‘3D Objects’ for the parent selection.