Floating Vitreous Cyst: Two Clinical Cases
A 39-year-old, highly myopic man with a 2-day history of a dark object floating in his right eye was examined in our clinic. The patient had no history of ocular trauma or intraocular inflammation. Best-corrected visual acuity was 0.4 in the right eye and 0.9 in the left eye. The anterior segments were normal in both eyes. 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. ). Posterior vitreous detachment (PVD) and an oval, opaque, and pedunculated cyst was seen in the vitreous cavity of the right eye (fig. ). The free-floating cyst was located in the inferior vitreous when the eye was in primary position and obscured the underlying retina. Fundus images were taken with a fundus camera and a spectral-domain optical coherence tomography (SD-OCT) (Heidelberg Engineering, Heidelberg, Germany) was performed (fig. ). B-scan ultrasound of the right eye demonstrated intravitreal opacities and confirmed the presence of a hyperechogenic cyst with no internal reflectivity (fig. ). The diameter of the cyst was 3.1 mm. Blood serology tests were negative for Toxoplasma gondii, Toxocara canis, cysticercosis and Echinococcus. Observation of the cyst was advised.