allergic reactions

I use Azopt and Alphgan eye drops twice a day and also take Methazolamide tablets.  Since I normally  have allergic reactions to eye drops I've discovered that if I rinse my eyes with saline solution for sensitive eyes I don't have any problems with redness and itchy eyes anymore.  Also, my doctor said that I should leave the Azopt in for 15 minutes and the Alphagan in for 5 minutes before rinsing out the eyes.  It has helped me be able to use eye drops, whereas before I couldn't.  However, I cannot use Travatan or Xalatan drops as the chemical makeup cause pain in my eyes.