how can you till if a chick is blind ?

[call ducks]

one of mine has olny 1 eye open and we had to get him out of the water 2 times yesterday.

 

[addicted2chicks]

I am not sure if there is a sure way to tell if it is blind. We had one that I realized after 3 days was smaller then the others. We gave her special care and when we would go to pick her up she wouldn't run like the others. So we flicked our finger in front of her face and she never moved. So we figured she was blind. We put a plate down with her crumbles on it and placed her on her plate and she would eat but she would eventually wonder off the plate. Then she would cheep and cheep so we had to put her back on the plate because it seemed she didn't know where the plate was, another reason we figured she was blind. In the end she didn't make it, but she did put up a good fight, she lived over a week. But I think with as often as we did feed her she still wasn't getting enough nutrition like she needed.
My guess is yours might be blind or something else is wrong with her. I am still new to chicks but I am guessing it is something else. Seems like she should be putting up a fight in the water even if blind. Hopefully someone else has an idea.