Today is Saint Patrick's Day, and along with the 'wearing o' the green' we're also stepping into what could be an explosive allergy season as more and more greenery pops up into view.  With severe symptoms, prescription medications may be necessary, and a visit to your eye doctor will be required to ensure the appropriate diagnosis is made.  For those of you experiencing milder symptoms of ocular itching, redness and tearing, there may be relief on the shelves at your nearest pharmacy.  There are several brand-name preparations of antihistamine with ketotifen available.  The newest of which is Zaditor, which relieves symptoms up to twelve hours with twice daily dosing.  Other options include Alaway (Bausch & Lomb), Claritin Eye (Schering Plough) & Refresh Eye Itch Relief (Allergan).  All are available in 5 mL bottles, but Alaway is also available in a 10 mL size, and may be a better value.  If you use any over-the-counter medication and experience little to no relief, call and make an appointment.  Make sure you bring whatever medication you have been using to determine the best course of action.