| 본문 : Purpose: We suggest how to define posterior vitreous detachment (PVD) via optical coherence tomography (OCT) by evaluating and describing the posterior vitreous structure of various selected cases using Enhanced high-density line mode in spectral-domain OCT (HD SD-OCT).
Methods: This is a descriptive case series of HD SD-OCT at Denver Health Medical Center, University of Colorado School of Medicine in 2014 and 2015. The medical records with ocular images for these patients were analyzed.
Results: With HD SD-OCT imaging, a posterior vitreous detachment may demonstrate a hyperreflective line corresponding to the posterior hyaloid membrane (PHM) on its posterior margin, or it may be absent. In some patients with a posterior vitreous detachment, HD SD-OCT images the PHM only in extrafoveal areas, whereas the fovea, on which the posterior precortical vitreous pocket (PPVP) was located previously, is devoid of the PHM.
Conclusions: A hyperreflective PHM anterior to the retina is a crucial finding to differentiate PVD from PPVP. The PHM tends to be detached extrafoveally, torn perifoveally and attached on the fovea where the PPVP has previously existed.
|