PMC3843905_01
Case 1. a Color fundus image of the right eye with peripapillary atrophy due to degenerative myopia and with a small intraretinal flame-shaped hemorrhage on the temporal part of the optic disc. b Grey, pedunculated vitreous cyst without pigment on its wall. c B-scan ultrasound (20 MHz; Aviso S; Quantel Medical, France) showing a free-floating cyst with a stalk-like extension. d SD-OCT showing a cyst with thick, irregular walls.
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F1
Dilated fundus examination revealed slightly tilted optic discs with peripapillary atrophy due to high myopia and small flame-shaped hemorrhage on the temporal side of the right optic disc (fig. 1a). Posterior vitreous detachment (PVD) and an oval, opaque, and pedunculated cyst was seen in the vitreous cavity of the right eye (fig. 1b). Fundus images were taken with a fundus camera and a spectral-domain optical coherence tomography (SD-OCT) (Heidelberg Engineering, Heidelberg, Germany) was performed (fig. 1d). B-scan ultrasound of the right eye demonstrated intravitreal opacities and confirmed the presence of a hyperechogenic cyst with no internal reflectivity (fig. 1c).
PMC3843905_02
Case 2. a A free-floating, partially pigmented cyst in the lower vitreous cavity is shown. b Infra-red image of the cyst with pigment clumping. c B-scan ultrasound (10 MHz; Cine-Scan S; Quantel Medical) of the cyst with reflective walls, clear contents and inferior temporal retinoschisis. d, e SD-OCT of the cyst with thin, smooth, and hyperreflective walls. Hyperreflective spots are seen inside the hyporeflective cyst which possibly correspond to pigment epithelial cells. The mirror image of a vitreous cyst is present in the first SD-OCT scan (d) due to a conjugate image artefact.
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F2
Fundus examination of the right eye showed a big, round, semitranslucent, and partially pigmented vitreous cyst just below the inferior temporal vascular arcades (fig. 2a, b). B-scan ultrasonography of the right eye showed partial PVD and a cystic, well-demarcated formation not fixed to any other ocular structures, with a diameter of 6 mm (fig. 2c). Inside the cyst, small hyperreflective spots were present (fig. 2d, e).