Development of optical coherence tomography for monitoring the glaucoma laser surgery

Abstract : The ability of optical coherence tomography (OCT) to deliver tomographic images of biological tissues in vivo non-invasively and in real-time has been a growing interest in many biomedical applications, mainly in ophthalmology for imaging the retina and the anterior segment of the eye. However, developing high-resolution OCT for imaging strongly scattering biological tissues like sclera and edematous cornea has still been the main challenge. In this PhD work, an ultrahigh-resolution (< 4 µm) Fourier-domain OCT (FD-OCT) system optimized at 1.3 µm center wavelength was developed in Laboratoire Charles Fabry – Institut d’Optique Graduate School. Using this OCT system, we have, for the first time, properly visualized the Schlemm’s canal of the human eye that is located in the strongly scattering corneal limbus at depth of ~ 0.8 mm. Schlemm’s canal has been our target for OCT imaging because it plays an important role for the management of the aqueous humor that is responsible for causing glaucoma - an eye disease that can potentially lead to blindness. In collaboration with Laboratoire d’Optique Appliquée at ENSTA ParisTech, we have also demonstrated real-time OCT imaging of the femtosecond laser surgery in excised human cornea. These studies have thus shown that the surgery of glaucoma by femtosecond laser, monitored by OCT, would be possible.
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Masreshaw-Demelash Bayleyegn. Development of optical coherence tomography for monitoring the glaucoma laser surgery. Other [cond-mat.other]. Université Paris Sud - Paris XI, 2012. English. ⟨NNT : 2012PA112406⟩. ⟨tel-00816669v2⟩

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