Deformidade corneana em usuário de lente de contato portador de ceratocone: relato de caso

• Autor(a) principal: Lipener, César [UNIFESP]
• Data de Publicação: 1999
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNIFESP
• Texto Completo: http://dx.doi.org/10.1590/S0004-27491999000600011; http://repositorio.unifesp.br/handle/11600/867
• topic: Keratoconus; Corneal warpage; Contact lens; Ceratocone; Lente de contato; Deformidade corneana

Introduction: Topographical alterations may occur as a secondary result of the use of hard or soft contact lenses. The expression corneal warpage is used to describe the corneal deformities caused by the lenses. Topographical map of initial keratoconus can be very similar to that of a patient with corneal warpage. Purpose: To describe a contact lens wearer with keratoconus who developed corneal warpage symptoms that were diag-nosed and studied by topographies and a series of clinical examinations. Case report: A forty-year-old patient with diagnosis of bilateral keratoconus for 12 years was wearing rigid gas permeable contact lenses since the initial diagnosis. On the first exa-mination in 05/95, it was impossible to determine the RE refraction and keratometry was more than 60.00 D. Topogra-phy was carried out being compatible with keratoconus and a Soper RGP lens was fitted with a 20/70 vision. One year later a control topography showed an increase in the central curve and a flattening of the inferior periphery. The use of contact lenses was interrupted and after further six months there was a reversal of the changes, and a new Soper lens was fitted with a better pattern and a 20/40 vision. Discussion: This case shows the occurrence of corneal de-formity in a keratoconus patient using RGP lenses. The au-thor discusses the pathophysiology and clinical and topographical diagnosis of corneal warpage, emphasizing the fact that patients with keratoconus as well as normal patients, can have these alterations which should be differentiated from the keratoconus evolution itself.