Evaluation of a posterior vitreous detachment

Article · August 2012with2 Reads
DOI: 10.1111/j.1755-3768.2012.02478.x · Source: PubMed
  • [Show abstract] [Hide abstract] ABSTRACT: To find the most reliable and efficient noninvasive technique to clinically detect a posterior vitreous detachment. In a prospective study of 30 eyes in 30 patients with macular pucker or macular hole formation, the posterior vitreous cortex was examined 1 day prior to a scheduled vitrectomy. Three independent investigators classified the posterior vitreous cortex of each eye as 'attached' or 'detached' via slit-lamp biomicroscopy (BM), 10-MHz B-scan ultrasonography (I³ Innovative Imaging Inc.), and optical coherence tomography [OCT III Stratus(®) (Carl Zeiss Meditec Inc.) and RTVue-100 OCT (Optovue Corp.)]. These preoperative findings were then compared during a triamcinolone acetonide-assisted vitrectomy 1 day later. Triamcinolone acetonide-assisted vitrectomy showed in 60% a posterior vitreous detachment and in 40% an attached posterior vitreous cortex. Preoperatively conducted B-scan ultrasonography and BM revealed the highest, correct evaluation of the posterior vitreous status. The prediction of the OCT was confirmed intraoperatively in 12.5%. In all other cases, the evaluation by OCT was not possible or was inadequate. The prognostic most reliable but investigator-dependent methods to clinically detect whether the posterior vitreous cortex is detached are B-scan ultrasonography and BM. The objective technique of the high-resolution, two-dimensional time-domain OCT allows only in a few cases a clear differentiation of preretinal structures.
    Full-text · Article · Jan 2012
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Patients with prominent vitreous opacities may demonstrate a characteristic shadowing on the volume-scanning protocols using spectral-domain optical coherence tomography. The authors present five cases of this characteristic shadowing artifact. This finding may be useful in objectively documenting the status of vitreous opacification and verifying the patient's complaint of symptomatic... [Show full abstract]
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