I get them and fear them. If I get an occular migraine, that means the end of my day right there. First I get a small blinking zigzag, usually in my lower right side of my vision. Then it grows and expands until it is a large curvy zigzag and I can't really see around it. I have to put my head down and shut my eyes. After about 30 minutes, it floats off the field of my vision and I can see again. Then a few minutes later, I get a huge headache above my right eye. The headache lasts until I can get a good night's sleep and sleep it off. No medication really helps the pain much. Just have to live with them.
Fortuately in my case, I know (more or less) what my trigger is - I narrowed it down to pressure on my right side neck, below the jaw. Isn't there some sort of major artery or vein there? (name escapes me). I know in my case, any pressure in that area of my neck can cause the migraine, as well as left-side weakness in my arm, too. I know I gotten migraines by simply looking down at my upper right arm for more than a few seconds (since that movement causes my shoulder to press up against my neck).
Right now I am being VERY careful about neck posture (and making sure nothing puts pressure on my neck), and I haven't had a migraine since May.

I am really hoping I finally found the trigger once and for all. What a difference a migraine-free life would be!