We know that if a man intends to marry a girl he is allowed to see her -however scholars may differ in their interpretation on what he may see of her- based on the hadith:
Narrated Jabir ibn Abdullah:
The Prophet (ﷺ) said: When one of you asked a woman in marriage, if he is able to look at what will induce him to marry her, he should do so. He (Jabir) said: I asked a girl in marriage, I used to look at her secretly, until I looked at what induced me to marry her. I, therefore, married her. (Sunan abi Dawod)
So what is the case for a blind man:
- As he is not able to see and blind people usually use their hands to get a picture of things, what is he allowed to do or what should he do to get induced to marry her? Especially as touching does not sound like a shari'a conform option?