Conjunctivitis is a common and highly contagious eye condition that causes inflammation of the conjunctiva, which is the thin and transparent membrane covering the white part of your eye. It can be caused by bacteria or viruses, as well as allergies and environmental irritants. If left untreated, conjunctivitis can cause vision problems and even blindness in some cases. Treatment depends on the cause and can range from antibiotics to antihistamines or artificial tears. It is important to get a diagnosis from a doctor before attempting to treat it yourself. Conjunctivitis, also known as pink eye, is a common eye infection that can affect both adults and children. It is characterized by redness and swelling of the conjunctiva - the thin layer of tissue that lines the inside of the eyelids. Symptoms of conjunctivitis include itching, burning or a feeling of sand in the eye, along with watery discharge and light sensitivity. It is important to get this condition treated right away in order to reduce symptoms and speed up recovery. It is caused by a number of factors, including allergies to pollen, dust mites, and animal dander; bacteria or viruses; and irritants such as smoke or chlorine in swimming pools. Treatment for conjunctivitis depends on the underlying cause but typically includes lubricating eye drops or ointments and antibiotics for bacterial cases.