Q. I generally like iOS 7 on my iPhone, but I find the default system type a little too thin and hard to read, especially on certain backgrounds. Is there a way to change to another font?
A. Apple has included an option for a bolder version of the iOS 7 system font used to display text, menu settings and labels on the iPhone, as well as on iPads and iPod Touch media players. To switch to the bolder look, tap the Settings icon on the Home screen and then on the Settings screen, tap General.
On the General screen, tap Accessibility. In the Vision section of the settings here, tap the button next to Bold Text to turn on the feature and get a thicker look to the system font. The iPhone reboots itself if you decide to make this change.
The Accessibility settings also include a Larger Dynamic Type option that works with Apple’s own apps like Mail and Notes. When you turn it on, you can drag a slider on the screen to select a more comfortable reading size for apps that take advantage of the Dynamic Type technology.
The iOS 7 software has other built-in tools designed to aid users with more serious vision impairments. These include settings for increasing the contrast for better legibility and a screen-magnifier function called Zoom. You can find more information on these featuresfor iOS at www.apple.com/accessibility/ios
NY Times http://www.nytimes.com/2013/10/03/technology/personaltech/making-ios-7-more-readable.html?src=recg