For all of their advantages, smartphones still fall a little short for some — specifically, for those living with visual impairment.

While apps like Siri and SayText do offer a good deal of assistance, 2011 TED Fellow Sumit Dagar had an idea for a more effective solution: a smartphone that's specifically designed for people who have trouble seeing.

The phone, which has yet to be officially named, has a screen comprised of a grid of pins, which move up and down to form into Braille shapes and characters whenever an SMS message or email is received. It uses what's called Shape Memory Alloy technology, so as each pin expands, it remembers and contracts back to its original flat shape.

In an interview with the Times of India, Dagar describes the phone as "[the] world's first Braille smartphone ... a companion more than a phone."

SEE ALSO: 8 Ways to Recycle Your Old Smartphone

Dagar, an interaction design graduate of the National Institute of Design (NID), came up with the idea for the phone three years ago. He's collaborating with IIT Delhi on the prototype, which is being tested at the LV Prasad Eye Institute. The team hopes to release the phone by the end of 2013, for about $185.

You can catch Dagar's TED Talk from 2011 here.

What do you think of this idea? Tell us below.

Image via iStockphoto, alle12