I was told I had optic disc drusen about year n half ago. In the last few months I've gotten these blindspot for about 10-15 mins in my centre vision accompanied with a slight headach, pressure pain in the back of my eye. Can be quite a large spot where I can't see my hands of objects in front of me. I see a grey haze cloud like thing. After 10-15 mins I got my normal vision back. Should I be concerned about this? Does the drusen cause this? I also have high eye pressure