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What you are seeking is a computer with the right set of hardware and software for people with low vision. Sometimes these people are called visually impaired. I am one of such.
To date I have not found an effective, economical solution for my visual impairment. One thing that helps a little is the use of dual monitors. The second monitor can be a mangier for the first monitor. You can pan the view area on the second monitors. But it is still awkward.
I have to use a monitor with at least 17 inches and special glasses and I have to withing 12 inches of the screen.
If you find something the works well, please let me hear about it. It is nervy frustrating to not be able to see what others can see.
One company that makes video cars with zoom on the second display is
Matrox. But there stuff is either privy or hard to find.
Matox GraphicsAlso, Google Search:
Visual Aids for Computers