Can long term eyes problem lead to blindness?
yes, long term eye problem can definitely cause a blindness, you should consult a eye specialist.
Cold water is always god for eyes.
Check out this link.
https://nfb.org/images/nfb/publications/books/books1/ifblnd10.htm
Informative information.
Explained well, very usefull link.
No, you should consult a good ENT specialist.