Hi sophielee,
I have recently had a check as I suffer with this too. Top tips for dry eye (from the optician) are avoid direct sunlight (wear sunglasses), protect against draughts to the eyes and use solutions when necessary to settle it down again.
I usually do this for a few days if I get a bad bout of dry/itchy/sore eye. I used to use the blue version of Hycosan but was recommended to go one step up to the red version. You can get both at Specsavers and they?ll advise you. Usually does the trick for me.
Other things that can trigger for me is air con and fluffy jumpers are a no no. Fibres that fly off reeeeeally annoy my eyes.
Anyway hope you find something that you can manage it with.