Least sedating antihistamine

It primarily occurs in boys and young men; about 75 percent of patients also have eczema or asthma.Symptoms include: If left untreated, vernal keratoconjunctivitis can impair vision.If symptoms persist or over-the-counter remedies do not bring relief, see an allergist, who will review your medical history and symptoms and conduct tests that can reveal an eye allergy.Those tests may include an examination with a microscope, which will show swollen blood vessels on the surface of the eye.Eye allergies share symptoms with some diseases of the eye, making accurate diagnosis imperative.The symptoms of eye allergy can range from mildly annoying redness to inflammation severe enough to impair vision.Symptoms are the same as with SAC, but tend to be milder.

Seasonal allergic conjunctivitis (SAC) is by far the most common type of eye allergy.Artificial tears are safe and can be used at any age.Some eyedrops, such as antihistamines and mast cell stabilizers, can be used in children 3 and older.In addition, your doctor may test for a certain type of white blood cell that shows up on areas of the eye affected by allergies.This involves gently scraping the conjunctiva (the inner lining of the eyelid) and seeing if those cells are found.The eyelids may be puffy, and bright lights may be bothersome.SAC symptoms often accompany the runny nose, sneezing and nasal congestion associated with hay fever and other seasonal allergies.Eye allergies develop when the body’s immune system becomes sensitized and overreacts to something in the environment that typically causes no problem in most people.An allergic reaction can occur when that “something” (called an allergen) comes in contact with antibodies attached to the mast cells in your eyes; the cells respond by releasing histamine and other substances or chemicals that cause tiny blood vessels to leak and the eyes to become itchy, red and watery.Nonprescription (over-the-counter, or OTC) eyedrops and oral medications are commonly used for short-term relief of some symptoms.They may not relieve all symptoms, and prolonged use of some OTC eyedrops may actually cause your condition to worsen.

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