Measurements of corneal topography using a compact null-screen corneal topographer with a mobile device
In this work, we use a null-screen corneal topographer with a semiradial spot pattern by using a mobile device’s camera to obtain images of the reflected pattern with the main aim of obtaining the corneal topography. First, we discuss how to integrate the system to calibrate it by testing a reference surface where we obtain optical parameters such as the radius of curvature and the conic constant, as well as elevation, sagittal curves, and meridional curvature maps with this method. Finally, we show some prelaminar measurements of the topography of some human corneas.
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Univ. Nacional Autónoma de México (Mexico)
Manuel Campos-Garcia is a researcher in the Institute of Applied Sciences and Technology of the National Autonomous University of Mexico (UNAM), México. He has teaching experience of 25 years in the Faculty of Sciences of the UNAM. He received his BS degree in physics from the National Autonomous University of Mexico (UNAM) in 1995. He received his MS degree and Ph.D. degree in Physics, respectively, in 1999 and 2005, both from the UNAM. He is a national researcher for the National System of Research, Mexico. He held a postdoctoral position at the National Institute of Optical and Electronic Astrophysics (INAOE) in 2009-2010. His research interests include optical metrology and instrumentation. His research has environmental and health applications, participates in the design and construction of parabolic trough concentrators, and develops corneal topographers based on null screens.