Comparted to some allergic reactions, most allergic eye conditions are more irritating than dangerous. However, some can result in permanent damage to the eye, for example allergic or vernal keratoconjunctivitis could result in scarring of the cornea and visual problems. Most allergic reactions are dry and itchy eyes.
Some of the ways to treat eye allergies are topical antihistamine/decongestant preparations, which are are effective and safe for mildly itchy, red eyes. Patanol, a topical mast-cell stabilizer, is a safe, highly effective, long-acting treatment. Topical steroids should be used with caution and under the supervision of an ophthalmologist.
There are things you can do to prevent allergy syptoms. Dry eyes may aggravate eye allergy symptoms. Tear substitutes, such as artificial tears, are an effective lubricant and a great treatment. Cold compresses may help, particularly with sudden allergic reactions and swollen eyes. Keep eyedrops refrigerated since this makes application more soothing.
As with any medical issues, if in doubt, seek medical advice sooner rather than later.