A steep peripheral ring in irregular cornea topography, real or an instrument error?
Carregando...
Fontes externas
Fontes externas
Data
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Tipo
Artigo
Direito de acesso
Acesso aberto
Fontes externas
Fontes externas
Resumo
Purpose To demonstrate that the steep peripheral ring (red zone) on corneal topography after myopic laser in situ keratomileusis (LASIK) could possibly due to instrument error and not always to a real increase in corneal curvature. Methods A spherical model for the corneal surface and modifying topography software was used to analyze the cause of an error due to instrument design. This study involved modification of the software of a commercially available topographer. Results A small modification of the topography image results in a red zone on the corneal topography color map. Conclusion Corneal modeling indicates that the red zone could be an artifact due to an instrument-induced error. The steep curvature changes after LASIK, signified by the red zone, could be also an error due to the plotting algorithms of the corneal topographer, besides a steep curvature change.
Descrição
Palavras-chave
Irregular corneal astigmatism, Red zone, Spherical aberration, Topography
Idioma
Inglês
Citação
Saudi Journal of Ophthalmology, v. 30, n. 3, p. 175-179, 2016.
