I experienced temporary blindness yesterday. I was drinking really late night and experienced it for around 5 seconds and was back to normal. It wasn't completely dark but was almost dark. I drink occasionally (2-3 times a month). In office it has been long working hours and improper sleeping and eating habits for the last few weeks. I haven't had any previous conditions or I am not under any medication. I want to know if this was just because of the stress I have put on my eyes in the last few weeks and because of drinking.