Apps for children who are visually impaired.

WonderBaby.org has listed what they consider to be their favorite iPads apps for children who are disabled or visually impaired in conjunction with 'Paths to Literacy'. The divide the list into categories. Some have a charge, some are free.
Here are the categories with some of the apps.
Vision:

"Tap & See Zoo": The developer of this app calls it "the first app for iPad and iPhone created specifically for children with cortical visual impairment." Find the app on iTunes.
"My Talking Picture Board": This app helps children with CVI learn how to locate and recognize two dimensional images. Use your own images of people or favorite objects! Find the app on iTunes.

"iLove Fireworks": This app makes big sounds and big visual displays with a simple tap of the finger. It’s also great for teaching cause and effect as well as increasing visual attention. Find the app on iTunes.
"Art of Glow": Simple drawing app with very responsive screen. Helps to build visual attention and cause and effect (no audio). Find the app on iTunes.
Motor/Cause & Effect:

"Baby Finger HD": The tap of a finger causes movements and sounds on the screen. Very easy to use and geared toward younger children. Find the app on iTunes.
"Cause & Effect Sensory Light Box": This is a really well made cause-and-effect app that creates sounds and lights when your finger is on the screen, then stops when you remove your finger. Perfect for children with low vision or CVI. Find the app on iTunes.
Communication:
"Talking Tom Cat": This animated cat repeats words and sounds in a funny voice. Encourages vocalization and interaction with the iPad. Find the app on iTunes.
"Answers Yes No": A simple yet extremely versatile app that turns your iPad into a communication switch that allows for an array of customizations. Find the app on iTunes.
Relaxation:
"Pocket Pond": Listen to birds chirp and frogs croak in a peaceful pond. Touch the screen to make the water splash or just watch the koi swim by. Find the app on iTunes.
Stories:

"Tickle Finger in the Jungle": In this highly interactive story, the reader has to help Tiny Tinga the monkey get home by "tickling" various predators along the way. Find the app on iTunes.
"Dr. Seuss's ABC": All the Dr Seuss story apps from Oceanhouse Media are very well done. The stories are interactive, include sound effects and add a whole new layer to classic Seuss tales. Find the app on iTunes.
Check for 'i' accessibilty features here.