The authors of most works will send us clear text if we ask. There are reasons why there is no free lunch but in this case we can ask the authors.
There are a proliferation of programs to convert images to pdf, which produce pdfs inaccessible to the screen readers used by visually impaired computer users.
Many of these are free, but when looking for software to convert these pdfs to editable text which the screen readers can report, one finds that the cost is crippling for people who don't tend to have the best paid jobs. Nitro, for example, has a free version only accessible to the sighted, and the image pdf to text software costs over £70.
I have looked for a freeware option for about a year without success.
Does anybody know of one such?