Optical coherence tomography versus Ultrasound Biomicroscopy in diagnosis of glaucoma

Aim Of The Work:Eevaluation of the anterior chamber angle by Ultrasound biomicroscopy and Optical coherence tomography ,evaluation of NFL by Optical coherence tomography and evaluation of optic disc by Optical coherence tomography.Summery:Optical coherence tomography provides objective, quantitative, reproducible measurements of the retina and RNFL thickness. In contrast with other imaging techniques, direct measurements of the RNFL are calculated from cross-sectional retinal images. Measurements are not affected by refractive status, axial length of the eye, or the presence of early-to-moderate nuclear sclerotic cataracts.OCT can be used for studying the structures of the scleral-corneal angle, thus proving to be a comfortable technique with high spatial resolution at this anatomic level.UBM can image the angle structures and detect the angle pathology. UBM is a contact exploration technique with an immersion system which requires patients to be in recumbent position.