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    Corneal tomography: Beyond but not in lieu of topography


    Corneal tomography represents a major advance for diagnosis, prognosis, and treatment planning, but there remains a need for classic imaging technologies, such as Placido topography, along with a comprehensive clinical evaluation, said Renato Ambrósio, Jr, MD, PhD.

    Scheimpflug corneal tomography is a 3-dimensional imaging technique that characterizes the anterior and posterior corneal surfaces, along with corneal thickness distribution. Discussing its applications, Dr. Ambrósio said that a classic question about tomography relates to whether it is a more sensitive modality than Placido disk-based topography to detect mild forms of keratoconus and screen for ectasia risk prior to refractive laser vision correction (LVC).

    Findings from research conducted by Dr. Ambrósio and others involving cases with very asymmetric ectasia (VAE) along with lessons learned from many case reports of post-LVC ectasia indicate that the answer is unquestionably “yes”. 1-13 Nevertheless, there is still room for improving its performance in this application.

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