I am so sorry about your chick. If this chick is completely blind, you may need to put her down. Some people have kept these birds alive, but with a lot of supportive care. You can use a water fountain that makes a lot of noise so the chick can find the water and you can leave food all around this area so the chick can aimlessly peck at the ground to find feed. Other than this, there isn't much you can do for a blind bird.
Definitely click on that last link that Kelise provided for you about someone else with this same issue and what they did about it.
Good luck with your baby and welcome to our flock!