I think I may have had episodic blindness I was on my phone for awhile, I may have only had my right eye open looking at the very bright screen, but when I put the phone away I felt like I couldn t see out of my right eye. Everything was very dark out of that eye and it took a couple of minutes for my vision to return to normal. I also have a slight headache that hurts a little more on the right side. Should I go to the ER? I am 22 years old and I ve been a smoker for 5 years.