 Since normal corneal tissue should be avascular (no blood vessel) and therefore clear to allow light to pass, the presence of blood vessel and the infiltration of cells as part of the inflammatory process results in scarring or hazing of the cornea.A positive VDRL of Treponema pallidum immobilization test confirms diagnosis of luetic(syphilitic) interstitial keratitis

The underlying cause must be treated as soon as possible to stop the disease process.Corticosteroid drop can be used to minimize the scarring on the cornea along with antibiotic cover.