Two great resources if you have vision problems caused by stroke.
Both of these are presented by the University College London. Both are free!
The first one is for a disorder called Hemianopic Alexia (HA).
HA is difficulty tracking along a line of text to find the next word in a sentence. If you have this problem, click on the image, below.
The same organization has options for hemianopia (loss of vision to one side) and spatial neglect (loss of attention to items on one side). You can find training for those here.