Well, if you washed your hands with soap and water, (you would only need water tbh) you probably got soap in your eye. Because lye would burn, or irritate, your skin as well.
So honestly, I think your THINKing to much into it and I'm sure you'll be fine.
However, if you really thing something is up go to a doctor.
I don't know much about what will happen, but if it causes blindness then I'm sure it can just cause slight loss of sight as well, but like I said I'm sure you'd know by now. As I'm very careful with my extractions, I don't know what lye burn feels like.
Also, you should keep vinegar on hand from now on

Just in case.
As for time, again I think (I'm not expert) that it would have already done its damage by now instead of waiting even 3 days to fully blind you.