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Danjie Li, Hirotaka Itakura, Shoji Kishi; Asymmetrical vitreous status in unilateral epimacular membrane observed by swept-source optical coherence tomography. Invest. Ophthalmol. Vis. Sci. 2013;54(15):6326. doi: https://doi.org/.
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© ARVO (1962-2015); The Authors (2016-present)
To investigate the vitreous condition in unilateral idiopathic epimacular membrane (IEM) using swept-source optical coherent tomography (SS-OCT)
We prospectively examined the vitreous status of 12 consecutive cases of unilateral IEM using slit-lamp biomicroscopy and SS-OCT (Topcon, Japan). Best-corrected visual acuity of 12 IEM eyes were 1.2 in 4 eyes, 0.4 was in 5 eyes, and 0.5, 0.6, 0.8 in one eye, respectively, and 1.2 in all normal fellow eyes. The mean refractive was -4 diopter in IEM eyes and -3.5 in the fellow eyes. OCT images were obtained with a horizontal and a vertical 12 mm scan through the fovea in both eyes. We compared the prevalence of PVD between affected and normal fellow eyes.
All 12 IEM eyes had complete PVD with Weiss ring on slit-lamp biomicroscopy. SS-OCT confirmed no vitreous structure and epiretinal membrane on the macula. Complete PVD was not observed in 12 fellow eyes. SS-OCT revealed the “posterior precortical vitreous pocket” on the macular area in all 12 normal fellow eyes. Because of the pocket, premacular vitreous cortex was present as a membrane separated from the gel. Premacular vitreous cortex was slightly detached in the perifoveal area in 10 eyes but attached at the disc.
SS-OCT enabled to depict the specific vitreous characteristics on the macula. The posterior wall of the “posterior precortical vitreous pocket” seems to serve a basic structure of IEM.
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