Abstract

To measure the shape of the fast corneal surface of the human eye, we propose the design and characterization of a compact corneal topographer using the capabilities of a smartphone. The performance evaluation of the compact corneal topographer includes the calculation and compensation of the distortion introduced by the smartphone lens used to acquire the images and the evaluation of a reference surface. To demonstrate the feasibility of our proposal, we performed surface topography measurements on some human corneas and compared the results with those obtained by a commercial corneal topographer. We showed that the results obtained with our algorithms were consistent with other methods that analyze the corneal surface.

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Evaluating the anterior corneal surface using an improved null-screen system

Manuel Campos-García, Victor de Emanuel Armengol-Cruz, and Arturo Ioan Osorio-Infante
OSA Continuum 2(3) 736-748 (2019)

Surface shape evaluation with a corneal topographer based on a conical null-screen with a novel radial point distribution

Manuel Campos-García, Cesar Cossio-Guerrero, Víctor Iván Moreno-Oliva, and Oliver Huerta-Carranza
Appl. Opt. 54(17) 5411-5419 (2015)

Dynamic point shifting with null screens using three LCDs as targets for corneal topography

M. I. Rodríguez-Rodríguez, A. Jaramillo-Núñez, and R. Díaz-Uribe
Appl. Opt. 54(22) 6698-6710 (2015)

Measurement and correction of misalignments in corneal topography using the null-screen method

Manuel Campos-García, Daniel Aguirre-Aguirre, Victor Ivan Moreno-Oliva, Oliver Huerta-Carranza, and Victor de emanuel armengol-cruz
OSA Continuum 4(1) 158-170 (2021)

Corneal topographer using null-screen patterned within a quadrangular acrylic prism

M. I. Rodriguez-Rodriguez, D. Gonzalez-Utrera, D. Aguirre-Aguirre, Brian Vohnsen, and R. Díaz-Uribe
Opt. Continuum 3(1) 36-50 (2024)