Are you positive the kitty can't see, or is there just the cloudiness?
I rescued a kitten who had bilateral eye infections at just a few weeks old. As he got a little older he developed cloudiness of both eyes which responded to cortisone drops, some kind of corneal edema. He was able to see through the cloudiness and lived that way for several years.
I suspect the virus that caused it also damaged his kidneys because he was eventually lost quite young (age 6) to kidney failure. One of the forum vet posters might know if this is a corona virus, herpes, or what.