<unk>  resolves in 65% of cases without treatment, within 2–5 days. The prescription of antibiotics is not necessary in most cases. Viral Viral<unk>  usually resolves on its own and does not require any specific treatment. Antihistamines (e.g., diphenhydramine) or mast cell stabilizers (e.g., cromolyn) may be used to help with the symptoms. Povidone-iodine has been suggested as a treatment, but as of 2008, evidence to support it was poor. Allergic For allergic<unk> , cool water poured over the face with the head inclined downward constricts capillaries, and artificial tears sometimes relieve discomfort in mild cases. In more severe cases, nonsteroidal anti-inflammatory medications and antihistamines may be prescribed. Persistent allergic<unk>  may also require topical steroid drops. Bacterial Bacterial<unk>  usually resolves without treatment. Topical antibiotics may be needed only if no improvement is observed after 3 days. No serious effects were noted either with or without treatment. Because antibiotics do speed healing in bacterial<unk> , their use may be considered. Antibiotics are also recommended for those who wear contact lenses, are immunocompromised, have disease which is thought to be due to chlamydia or gonorrhea, have a fair bit of pain, or have copious discharge. Gonorrheal or chlamydial infections require both oral and topical antibiotics. The choice of antibiotic varies based on the strain or suspected strain of bacteria causing the infection. Fluoroquinolones, sodium sulfacetamide, or trimethoprim/polymyxin may be used, typically for 7–10 days. Cases of meningococcal<unk>  can also be treated with systemic penicillin, as long as the strain is sensitive to penicillin. When investigated as a treatment, povidone-iodine ophthalmic solution has also been observed to have some effectiveness against bacterial and chlamydial<unk> , with a possible role suggested in locations where topical antibiotics are unavailable or costly. Chemical<unk>  due to chemicals is treated via irrigation with Ringer's lactate or saline solution. Chemical injuries, particularly alkali burns, are medical emergencies, as they can lead to severe scarring and intraocular damage. People with chemically induced<unk>  should not touch their eyes to avoid spreading the chemical.
Conjunctivitis
Subconjunctival bleeding
Laryngitis
Glaucoma
Pharyngitis
Posthitis
Sinusitis
Cerebritis