My son is 6 years old and is complaining of sore eyes, rubbing them and blinking a lot. We moved back to Sydney last week after living in New York City for 3 years, and it started about 2 days after moving home. He is also complaining occasionally of a sore stomach, but it's his eyes that are causing the most trouble. In New York we lived in an apartment in the city, here in Sydney we are in a fairly bushy area with a backyard. Could it be allergens and things like grass, and is there anything we could do to help him? They are not red or swollen at all.