Fluorometholone is a corticosteroid with an excellent anti-inflammatory action with no significant influence on the intraocular pressure. The anti-inflammatory activity of Fluorometholone is at least 40 times stronger than that of Hydrocortisone. Corticosteroids are thought to act by the introduction of phospholipase A2 inhibitory proteins. It is postulated that these proteins control the biosynthesis of potent mediators of inflammation such as prostaglandin and leukotrienes by inhibiting the release of their common precursor, arachidonic acid. Arachidonic acid is released from membrane phospholipids by phospholipase A2. In comparison with other corticosteroids Fluorometholone is more rapidly degraded in tissue and therefore has less effect on the intraocular pressure. The immunosuppressive action of Fluorometholone is less pronounced than that of Dexamethasone.