Swollen eyes can occur due to a variety of reasons including dry eyes, allergies, lid infections & ocular trauma. Age-related changes also affect lid anatomy which can give the appearance of swollen eyes. Swollen eyes may be temporary in cases of lid infections but can be recurrent or chronic in cases of dry eye and chronic blepharitis. While usually not threatening, in some cases, swollen eyes can indicate a serious bacterial infection requiring urgent hospitalization. Your optometrist is best suited to properly diagnose swollen eyes and recommend the best treatment.