title: Full OCT anterior segment biometry: an application in cataract surgery.
abstract: In vivo three-dimensional (3-D) anterior segment biometry before and after cataract surgery was analyzed by using custom high-resolution high-speed anterior segment spectral domain Optical Coherence Tomography (OCT). The system was provided with custom algorithms for denoising, segmentation, full distortion correction (fan and optical) and merging of the anterior segment volumes (cornea, iris, and crystalline lens or IOL), to provide fully quantitative data of the anterior segment of the eye. The method was tested on an in vitro artificial eye with known surfaces geometry at different orientations and demonstrated on an aging cataract patient in vivo. Biometric parameters CCT, ACD/ILP, CLT/ILT Tilt and decentration are retrieved with a very high degree of accuracy. IOL was placed 400 μm behind the natural crystalline lens, The IOL was aligned with a similar orientation of the natural lens (2.47 deg superiorly), but slightly lower amounts (0.77 deg superiorly). The IOL was decentered superiorly (0.39 mm) and nasally (0.26 mm).
authors.affiliation: Instituto de Óptica "Daza de Valdés", Consejo Superior de Investigaciones Científicas, C/Serrano 121, 28006 Madrid, Spain.
authors.forename: Sergio
authors.initials: S
authors.lastname: Ortiz
authors.forename: Pablo
authors.initials: P
authors.lastname: Pérez-Merino
authors.forename: Sonia
authors.initials: S
authors.lastname: Durán
authors.forename: Miriam
authors.initials: M
authors.lastname: Velasco-Ocana
authors.forename: Judith
authors.initials: J
authors.lastname: Birkenfeld
authors.forename: Alberto
authors.initials: A
authors.lastname: de Castro
authors.forename: Ignacio
authors.initials: I
authors.lastname: Jiménez-Alfaro
authors.forename: Susana
authors.initials: S
authors.lastname: Marcos
keywords: (110.4500) Optical coherence tomography; (110.6880) Three-dimensional image acquisition; (120.4640) Optical instruments; (120.4800) Optical standards and testing; (120.6650) Surface measurements, figure; (330.7327) Visual optics, ophthalmic instrumentation