If your eyesight isn't what it used to be, you may find the small text on your iPhone or iPad hard to read. But there's no need to strain your eyes. And fortunately for you, I got my first pair of glasses at age six, so I'm way ahead of you on this being blind thing. Here are several tricks I use to make reading on an iPhone or iPad easier on the eyes:
1. Increase text size
Not every app supports dynamic type, but many do. To increase text size, go to Settings>General>Text Size. Adjust the slider to the right until you reach your preferred text size. If that's not big enough you can make the text even bigger in Accessibility settings
2. Bold the text
When iOS 7 first came out, many people complained that the lighter, thinner text was hard to read. The solution is simple; bold the text. go to Settings>General>Accessibility and toggle Bold Text on. Changing this setting will cause your phone to restart.
3. Invert the screen colors for low light viewing
If you like to use your iDevice in bed or in other low light settings, you may find that the bright light from your iPhone or iPad hurts your eyes. You can solve this problem by inverting the screen colors. Go to Settings>General>Accessibility and toggle Invert Colors on. Ahh. That's better.