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In page Corneal abrasion:

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Topical antibiotics are used to prevent concomitant infections, which result in slower healing of corneal abrasions.[4] Ointments are considered the first-line treatment, as they are more lubricating than drops. If the person uses contact lenses, an antibiotic with anti-pseudomonal activity is preferred (ciprofloxacin, gentamicin or ofloxacin), and the use of contact lenses should be discontinued until the abrasion has healed and the antibiotic treatment has ended. This is because contact lens wearers are often colonized with Pseudomonas aeruginosa, which may cause corneal perforations and subsequent permanent vision loss.[citation needed]