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Abstract
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 ate
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 detect structural defects very early before functional defects 111
glaucoma-risk patients.
OCT offers early detection of glaucoma structural damage. Predictive
of the future onset of VF loss in glaucoma risk patients.
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.
The technique can be slightly uncomfortable for some patients and not very well tolerated in some cases. In addition, the position of the echography sound and the patient eye can vary in the course of the test and this involves
a potential increase in the variability of the measurements. ill fact, the
reliability of the test largelydepends on the collaboration of the patient arid
the experience of the operator.