• Infections with bacteria (staphylococcus, streptococcus, gonococcus, chlamydia);
• Virus infections (adenoviruses, herpesviruses);
• Allergens (dust, pollen, dyes, contact lenses);
• Irritating factors: shampoos or other cosmetics, cigarette smoke, chlorine used to treat water (swimming pool);

• Congestion (hyperemia / redness of the conjunctiva);
• Hiperlacrimare;
• Itching (itching) or eye burning;
• White-yellow or greenish secretion that occurs in the conjunctival sac and sometimes causes sticking of genes (cilia, especially in the morning after sleep)

Bacterial conjunctivitis is treated with antibiotic colitis. There are currently very wide-spectrum antibiotics very effective in this situation. In some cases, antibiotic ointments and other anti-inflammatory drugs may be used.

It is essential that antibiotic treatment be fully respected (5-7 days recommended by the doctor), even if the symptoms disappear after the first days of administration. Viral conjunctivitis is relatively common, and can also accompany seasonal respiratory infections (influenza and paragripal viruses). It usually has an autolithic evolution. Sometimes it may be accompanied by keratitis (inflammation of the cornea), and then the progression may extend for several weeks.

Allergic conjunctivitis usually occurs in people with allergic (atopic) fields, with antiallergic collagen treatment, sometimes accompanied by general antiallergic medication. The importance is allergen identification (specific tests are performed), its removal from the environment or desensitisation treatments.