I'm 56 and used to get horrendous migraine pain. Since I was in my 40's I just get the aura. Those are still disabling, my sight is messed up and to top it off, the nausea is there along with that horrible fatigue after my vision is back to normal.

One thing that seems to trigger mine are halogen and fluorescent lighting or sun glare off shiny objects. Got to have sun glasses that reduce or elimate glare if I go out in the sun.

My husband sometimes parks the van in the drive where the evening sun glares off the windows right into my kitchen window. I have to remind him every once in awhile not to park there.

Hi - have been getting aura type migraines for about twenty or so years and yes have got worse for last five or six which I thought coincided with another health issue I have (RA). Probably age.
Dr says yes they do come in clusters and medicos dont know why. I have situations perhaps twice a year where I will get them every two or three days for a period of two to four weeks. Then might go a month with none. As I have got older some are followed by knock out headaches - the classical migraine which I had a few times over the course of life before this aura thing started (when of course at the very least I thought I must have a brain tumour!!)...
Agree with Rosetaz about lights and reflections triggering - I have to watch certain computer screens as well. But also foods and weather.
Suspect like most health issues no two people exactly alike in symptoms and presentation and what you experience is a pattern (with variations) which isnt uncommon.

thanks for your replies i too seem to be bothered by bright lights and glare and weather changes. I don't get the drastic headache but i do feel blown out and anxiety about my eyes. Its all about the eyes with me. Then i start to think and worry about them. double edged sword. I shouldn't worry just go along for ride and go on with life.