In Health Matters, digital tablets, such as the iPad and Kindle, can boost reading speeds in people with certain types of eye diseases.
Researchers looked at 100 people with eye diseases that damaged their central vision.
They found reading speed increased by more than 40 words per minute when using an iPad with an 18-point font setting.
And on average 12 words a minute using a Kindle with an 18-point font.
Patients with the poorest vision showed the most improvement in reading speed when using tablets compared with print books or newspapers.
The team believes the contrast between words and the backlit screen was is one of reasons why
Study authors hope the findings will help eye doctors advise patients with various degrees of vision loss ways to continue reading.
The study was presented at the annual meeting of the American Academy of Ophthalmology in Chicago.