There are electronic magnifying lenses that help in using paper (but seen on a screen) which are simple enough to operate (basically they are a camera and a scr

There are electronic magnifying lenses that help in using paper (but seen on a screen) which are simple enough to operate (basically they are a camera and a screen). The small "portable" ones are fine for spot/occasional use, but ot read a book one of the large "desktop" devices is usually working better, though it is inconvenient as the user needs to be sitting at a table. These help a lot when the (I have to presume the illness is a maculopathy) visual impairment is at a stage when there is a need for high contrast (BTW most of these can change colours of text, as every person might have a different capability with different colours for text and background). Unfortunately often what the patient sees is also somehow "garbled", horizontal lines may start being not look straight anymore and then reading becomes very difficult as some letters may be "jumped over", the common test is with a "Amsler grid": https://en.wikipedia.org/wiki/Amsler_grid https://en.wikipedia.org/wiki/Amsler_grid the wikipedia article also shows how a patient might see it. In a further stage, the patient might develop "holes" or black areas right in the middle of the visual field and reading becomes even more difficult, as it is needed to move the eyes and try to catch the letters on a more peripheral area. That is called "eccentric fixation", and it is part of "visual rehabilitation" programs that attempt, through specific exercises, to train the patient to use their eyes in a "different" way to overcome, at least partially, the central sight issues. Of course it all depends not only on the specific kind of illness, but also on the specific patient and patterns of vision. To give you a single personal anecdata my mother for some time had a very good response to simply using specific filter lenses (yellow-red). Here: https://www.intechopen.com/chapters/72559 https://www.intechopen.com/chapters/72559 you can find an introduction to the matter, but of course you need to find in your area appropriate medical structures.