Sir,

Corneal dermoids are a rare cause of corneal opacification consisting of abnormal mesoblastic tissue covered by the epithelium. They can involve the deeper layers of cornea leaving an intact descemet's membrane and endothelium. Occasionally, anterior segment structures may be involved by the choristomatous growth and there may occur accompanying ocular malformations. A surgical intervention in the form of lamellar keratoplasty (LK) or penetrating keratoplasty (PK) is warranted on accounts of cosmesis, discomfort, and primarily because they are located in the visual axis. Recently, we treated a child with a corneal dermoid encroaching on to the visual axis. An anterior deep lamellar keratoplasty was performed after the assessment of depth of involvement of the corneal mass by ultrasound biomicroscopy. To our knowledge this is the first report of a successful deep LK in a patient with a corneal dermoid.

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