Allergic reactions to airborne substances usually involve the parts of the body that serve as entrance portals for irritating substances. These are primarily the mucous membranes of the eyes, nose and throat. The eyes are often reddened and swollen and itch severely. In contrast to eye irritations caused by infections, an allergic reaction usually affects both eyes. Additional symptoms may include rhinorrhea and frequent sneezing.
Around 40% of persons suffering year-round from allergies eventually also develop allergic asthma.
Allergies can be caused by substances that are present seasonally or year-round. Seasonal allergens include the pollen of various types of grass, herbs, grains, or early blooming trees.
For allergic eyes, OmniVision offers products with three different active ingredients. The eye drops with azelastine (Azela-Vision®) or ketotifen (Allergo-Vision®) have a triple action: they stabilise the mast cells of the immune system, block the receptors of histamine and are anti-inflammatory. They offer relief within a few minutes. In addition, OmniVision also provides duraultra N sine anti-allergy eye drops for short-term use. The active ingredient naphazoline helps to constrict the dilated blood vessels in the irritated eye, reducing the swelling of mucous membranes. Watering of the eyes is reduced. In order to prevent allergic reactions as well as irritation to already inflicted eyes, they do not contain preservatives. Preservatives themselves can trigger allergies.
The active ingredient azelastine is an anti-allergy substance that prohibits the production and release of inflammatory substances such as histamine. In an allergic reaction, histamine is released from the cells of the immune system, the so-called mast cells. Azelastine has a stabilising effect on these mast cells and thus prevents the continued release of stimulant transmitters. The azelastine additionally binds to specific cell receptors for histamine, the so-called H1 receptors, inhibiting the transmitter. With its anti-inflammatory (antiphlogistic) effect, azelastine reduces the symptoms of allergic conjunctivitis and prevents it.
The soothing effect of the eye drops with azelastine is felt after only a few minutes and lasts for up to 12 hours. The products are also suitable for children from four years of age with seasonal allergic conjunctivitis.
The active ingredient ketotifen is anti-allergic, similar to azelastine. Ketotifen is also used for seasonal allergic conjunctivitis. It also stabilises the mast cells, blocks the H1 receptors and is anti-inflammatory. Eye drops with ketotifen are also effective within minutes. They are suitable for children aged three years and over and for breastfeeding mothers.
Eye drops with the active ingredient naphazoline are suitable for the short-term treatment of non-infectious or allergy-related conjunctivitis. Naphazoline quickly reduces the redness due to its constrictive properties and and decreases the swelling mucous membranes.