Eye Allergies

What is eye allergy?

Eye allergies happen when the eyes turn red and becomes swollen. It is the eye’s way of telling you that it is going through an allergic reaction. Like any other part of the body, the eye may also be subjected to certain states or circumstances that may cause an allergic response. The eyes may find some substances too irritating and cause an allergic reaction.

Eye allergies generally affect the eye’s conjunctiva, the clear layer of skin of the eye that covers the cornea up into the inner surface of the eyelids. Eye allergies that affect this part of the eye is usually known as allergic conjunctivitis.

Allergic conjunctivitis is further divided into different subtypes. The most common of them is the perennial allergic conjunctivitis or PAC and the seasonal allergic conjunctivitis or SAC. Both of these types of eye allergies are usually caused by an immune reaction to an allergen by the sensitized conjunctiva of an individual.

Allergic conjunctivitis can usually happen to a person whose eyes come into contact with a substance or substances that his or her body perceives to be an allergen. These substances may differ from person to person and to how sensitized the reactions of the body is from these allergens.

The skin making up the conjunctiva in the eyes is similar to the type of skin that lines the inner surface of the nose. That is why a substance that may induce an allergic reaction to the nose may also affect the eyes as well and also cause an allergic reaction to it.

What causes eye allergies?

There are several substances in the environment that may cause eye allergies. Some of the common ones include, pollen from plants, dust, weeds, grass and minute irritants coming from pets. The difference between the seasonal and the perennial subtypes of allergic conjunctivitis may lie on the timing of the symptoms.

SAC or seasonal allergic conjunctivitis usually cause problems for a short period of time that may come with the increased amounts of allergens such as pollen in the environment as what happens during springtime. PAC or perennial allergic conjunctivitis may last throughout the whole year and may be mainly caused by allergens that can be found indoors such as pet dander, dust mites or molds.

Symptoms of eye allergy

There are general symptoms that is associated with eye allergies such as that in SAC or PAC. One if the primary symptom is eye itching caused by the allergic reaction of the conjunctiva to a certain substance.

Other common symptoms that may be experienced include redness in the eyes, tearing, and blurred vision. Some eye allergies may also cause a burning sensation in the eyes as well as some mucous discharge.