Trust me, I do understand that well too. My girlfriend has very poor vision, borderline legally blind for driving. When we purchased a notebook for her we went with a 17" screen but also very high resolution. I then used Windows DPI scaling to bring everything up to a size she can read easily but the high native resolution keeps the image nice and sharp. She was very pleased with the results and can use it with ease.
Windows DPI scaling used to not work very well. Maybe it has improved. For example, I remember Windows XP applications with text running off the edges of windows and buttons. Perhaps Windows DPI scaling is a reasonable option now.
