ArticleGraefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie2019
Monitoring of visual field over 6 months after active ocular toxoplasmosis.
Article in Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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9 authors at 7 institutions in 1 country.
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Abstract
purposeTo prospectively report the perimetric defects during a 6-month follow-up (FU) in patients with initially active ocular toxoplasmosis (OT).
methodsTwenty-four patients were studied, including 11 eyes with chorioretinal toxoplasmosis proven with a positive aqueous humor sample and 13 eyes with a biologically unproven, chorioretinal lesion. Automated 24-2 SITA-Standard visual fields were performed at baseline, at the first, and sixth months of FU. A composite clinical severity score was calculated from visual acuity (VA), severity of vitreitis, chorioretinal lesion size, location of the lesion in zone 1, the presence of an initial macular or papillary edema, and long-term scarring. This provided a relative cutoff level of severity. Nine eyes out of the 24 eyes were considered severe (3 unproven and 6 proven OT).
resultsInitial and final visual field parameters (mean deviation [MD] and pattern standard deviation [PSD]) were significantly correlated (r = 0.873; p < 0.001, and r = 0.890; p < 0.001, respectively). During FU, only foveal threshold [FT] was correlated with VA at baseline (r = 0.48; p = 0.01) and at the 6-month FU visit (r = 0.547; p = 0.004). The MD initial predictive value of clinical severity was 0.739 according to the ROC curve. At baseline, severe and nonsevere OT exhibited no significant difference in term of MD (p = 0.06) and PSD (p = 0.1). During the FU, taking into account all the data, MD, PSD, visual function index [VFI], and FT were associated with the severity of toxoplasmosis (p = 0.018, 0.05, 0.016, and 0.02, respectively): the unproven group had a faster recovery of MD during FU (p = 0.05).
conclusionVisual field parameters better reflected the chorioretinal destruction related to the toxoplasmosis lesion and the functional repercussions than VA alone. Interestingly, MD at presentation could be a discriminating factor of severity in active OT, and each visual field parameter follow-up could be a support to manage patients with active OT, especially in the severe group.
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