Pain in Eyes: Can I revert the color scheme from iOS 7 to iOS 6?

Dear Support Community,

My mom has several eye problems and the iPad allowed her to once again to read, easily take notes, do research on the internet and keep in touch by e-mail.

However, after the update to iOS 7, she has started to feel nausea and major discomfort with her eyes. Two of her most used apps are "Notes" and "Calendar", where the "Notes" color scheme from iOS6 was much softer on the eyes with the light yellowish background paper color and guiding lines.

We have tried to download several different notepad apps, but none offer the same simplicity as the previous "Notes" app from iOS6. We also played with the contrast and letter size, but it doesn't come close to the previous experience.

Up to now, I have only found articles stating that it is not possible to directly revert back to iOS7. However, does anyone know if there is a link somewhere allowing to upgrade to iOS6? We would therefore do a factory reset and reupdate to the 6.

Thank you in advance for your support.