Doctor's Notes on Eye Allergies
Allergic reactions to environmental agents that involve the eyes are common. An allergic reaction that affects the conjunctiva, a clear layer of mucous membrane overlying the eyes, is referred to as allergic conjunctivitis, which is divided into several subtypes, with the most common being seasonal allergic conjunctivitis (SAC) and perennial allergic conjunctivitis (PAC). SAC and PAC are triggered when someone who is allergic to a particular substance, such as pollen, is exposed to it. Common allergens include trees, grasses, weeds, dust mites, pets (especially cats and dogs), and molds.
Symptoms of allergic reactions that affect the eyes include itchy eyes, watery eyes, red eyes, swollen eyes, burning sensation, and mattering and/or mucous production. Symptoms of pain, blurred vision, double vision, or changes in vision are not typical eye allergy symptoms and require medical attention.
Kasper, D.L., et al., eds. Harrison's Principles of Internal Medicine, 19th Ed. United States: McGraw-Hill Education, 2015.