Sight and Vision

I was talking to some one about injustice of Allah and his answers opened new questions for me but I want to share that conversation:

Me: “Why Allah makes some people blind or deaf or disabled. It’s not fair with those people.”

He: “Actually we don’t know what is right or wrong. So, how can we be the judge of these things? Can you honestly say that to have a sight is good thing?”

I kept silent because honestly I don’t know the answer. I also remember a quote that says: “The worst thing than losing your sight, is losing your vision.”

I know vision comes with feelings and from heart and Allah gives every person that so how can I say that Allah is not being fair?

Think about it, J