Journal
INTERNATIONAL OPHTHALMOLOGY
Volume 43, Issue 8, Pages 3011-3022Publisher
SPRINGER
DOI: 10.1007/s10792-023-02689-z
Keywords
Acanthamoeba keratitis; Fungal keratitis; Confocal scan; Sensitivity; Specificity
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The purpose of this study was to determine the diagnostic accuracy of confocal scan for Acanthamoeba keratitis (AK) and fungal keratitis (FK). The results of the meta-analysis showed that confocal scan had acceptable performance in diagnosing both AK and FK.
PurposeAcanthamoeba keratitis (AK) and fungal keratitis (FK) are two microbial keratitis that cause serious damage and, without early accurate diagnosis and treatment, may lead to blindness. In vivo corneal confocal scan, as an emerging ocular diagnostic method in comparison with microbiological smears and cultures as the gold standard, may assist in accelerating appropriate diagnosis.ObjectiveTo determine the diagnostic accuracy of confocal scan for the diagnosis of AK and FK.MethodsData were collected via a comprehensive literature search of PubMed, Web of Science, Cochrane Library, Embase and Scopus using keywords related to diagnostic accuracy of confocal scan in AK and FK up to October 2022. Pooled data underwent meta-analysis in terms of sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and overall diagnostic odds ratio (DOR) of confocal scan for the diagnosis of AK and FK.ResultsThe final 14 relevant studies were identified, including 1950 eyes. Meta-analysis in AK group revealed 94% sensitivity, 87% specificity, 89% PPV, 92% NPV, and DOR of 143.32, and in FK group disclosed 88% sensitivity, 85% specificity, 85% PPV, 88% NPV, and DOR of 75.98.ConclusionThe accuracy of confocal scan for the diagnosis of AK was significantly more than that for detecting FK; despite the limitations such as limited numbers of available retrospective studies for the detection of FK, confocal scan had an acceptable performance in detecting FK eyes. The overall performance of NCS was similar with that of HRT-RCM for the detection of both types of keratitis.
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