Peristence of triamcinolone crystals after intra-vitreal injection: Benign crystalline hyaloidopathy
A 59-year-old asymptomatic diabetic male was referred to our retinal service with presumed diagnosis of asteroid hyalosis. The patient had undergone laser treatment and intravitreal preserved triamcinolone acetonide injection for clinically significant diabetic macular edema in the right eye 4 years previously. Anterior segment examination revealed a posterior chamber intraocular lens with no other remarkable findings. Mild non-proliferative diabetic retinal changes were present in both eyes. The right eye showed focal laser scars in the macula and several shiny refractile crystalline deposits []. Optical coherence tomography localized these deposits to the posterior hyaloid []. These deposits were isofluorescent and not associated with specific angiographic abnormalities []. The patient has been followed for two additional years without any change in the visual acuity or status of the macula. Although a posterior vitreous separation has not developed, the crystals have been observed to migrate slowly in distribution.