How do you reduce swollen allergy eyes?

COMBINED: Over the counter allergy eye-drops (allergan, murine, etc) and cool (not cold) compresses should take down the swelling.

Medicated OTC drops: Drops containing ketotifen ophthalmic, zaditor, alaway, etc, are often more effective than artificial tears or murine, if symptoms are severe. Also consider otc antihistamines, but avoid the ones with decongestants, as these can dry out your eyes. See an ophthalmolgist or eyemd if you are not improving in a few days, as there are stronger prescription eyedrops available if the otc does not work.

Cool compreses: Cool compresses and otc allergy eye drops such as opcon a.