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PubMed · 7713253

Imaging of optic disc drusen: a comparative study.

S Kheterpal·P A Good·D J Beale·E E Kritzinger
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Abstract

The choice of imaging technique to identify the presence of optic disc drusen has not been well established. We performed computed tomography (CT), magnetic resonance imaging (MRI), fundus fluorescein angiography and B-mode ultrasonography (B-USG) on four patients with optic disc drusen as the sole identifiable pathological process. CT, MRI and examination for autofluorescence demonstrated the presence of drusen in only one case each. B-USG showed characteristic features of optic disc drusen in all cases. We suggest that B-USG, a non-invasive and inexpensive technique, may be the imaging method of choice in identifying the presence of disc drusen.

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Fluorescein AngiographyHumansMagnetic Resonance ImagingOptic Disk DrusenTomography, X-Ray ComputedUltrasonographyComparative StudyJournal Article

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BibTeXRIS

S Kheterpal, P A Good, D J Beale, E E Kritzinger. 1995. Imaging of optic disc drusen: a comparative study.. https://doi.org/10.1038/eye.1995.10

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Horseshoe-like macular tear following recurrent branch retinal vein occlusion.

BACKGROUND: A macular hole can develop as a late complication secondary to a branch retinal vein occlusion (BRVO). We report about an atypical horseshoe-like tear occurring in the fovea after recurrent BRVO. METHODS: An interventional case report. RESULTS: In 1997, a 53-year-old man was seen with an occlusion of macular part of inferior temporal vein of the retina on the left eye. After experiencing several recurrent BRVO in this eye, 6 years later he presented with a horseshoe-like tear in the fovea. Visual acuity was 20/200. The patient underwent standard three-port vitrectomy and installation of C3F8 16%. Intraoperatively, massive traction of the vitreous was detected on the edges of the tear. Six months after the operation, the tear remained attached. The visual acuity was 20/200. CONCLUSIONS: The uniqueness of the presented case is the occurrence of a macular tear following recurrent BRVO, its horseshoe-like shape and foveal location. To the best of our knowledge, this is the first report on a horseshoe-like tear seen in the fovea secondary to BRVO. We assume that chronic macular edema and retinal ischemia following BRVO were additional factors beside the vitreous traction, contributing to the formation of the macular tear. Anatomical closure of the tear and stabilisation of visual acuity can be achieved by vitreoretinal surgery.

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