I'm sighted, and recently went on a date with a guy who turned out to be blind. I didn't actually pick up on the fact that he was quite blind for a long time. He shared it with me, and I politely acknowledged the information. That he was vision impaired didn't impact the date at all as far as I was concerned.

Putting it on a dating profile is more likely to make it difficult to attract a date, because dating apps validate and promote extremely judgemental behaviour. Win them over with your charisma, and if it becomes relevant at all during your date, then bring it up.

Other line I use tons because I never take my sunglasses off is "My future's so bright, I gotta wear shades!"

The reality of dating is that you have to put your best foot forward and that often means not advertising things that will turn people off before they know you. Not just disability but, say, a messy divorce as well. Once people know you a bit they are more likely to see that your legal blindness is just an element of who you are. On the first date or on a profile it's likely to stand out more. That's my opinion, I just don't think there's a great way to disclose it without it seeming like a big deal.