Keratoconus posticus

The findings in keratoconus posticus have been outlined and a review of the literature of this rare developmental anomaly has been made. A case of keratoconus posticus circumscriptus has been presented. It is postulated that a delayed separation of the lens vesicle from the surface ectoderm may be an etiologic factor. Furthermore, the ophthalmologist should recognize that the presence of keratoconus posticus is not a contraindication to intraocular surgery. Finally, although there are extensive posterior corneal changes in keratoconus posticus, little visual acuity is lost since the posterior corneal face is relatively ineffective as a refractive surface.