What can be a trigger for allergic conjunctivitis symptoms?

• A. Sun exposure
• B. Pollen
• C. Dust mites
• D. Both B and C

Answer: (D)

Allergic conjunctivitis is an inflammatory response of the conjunctiva caused by exposure to allergens. Pollen and dust mites are common environmental allergens that can trigger symptoms in susceptible individuals.

Pollen, particularly from trees, grasses, and weeds, is a well-known seasonal allergen that can lead to increased symptoms during specific times of the year when these plants release their pollen into the air. Upon exposure, the body’s immune system mistakenly identifies pollen as harmful, leading to the release of histamines and other chemicals that cause the characteristic symptoms of allergic conjunctivitis, such as itching, redness, and tearing.

Dust mites, on the other hand, are common indoor allergens that can trigger symptoms year-round. These tiny creatures thrive in household dust and are often found in bedding, upholstery, and carpets. When individuals who are allergic to dust mites come into contact with them, the same histamine response occurs, resulting in allergic conjunctivitis symptoms.

Both pollen and dust mites can independently cause allergic conjunctivitis, making the option that includes both B (Pollen) and C (Dust mites) the correct choice.