Biomicroscopic evaluation and photography of ocular toxoplasmosis.

The vitreous of 39 eyes with ocular toxoplasmosis was studied and photographed using an El Bayadi-Kajiura preset lens. In active cases of toxoplasmosis, the vitreous showed inflammatory opacities and gel shrinkage. In inactive cases, the vitreous was often liquefied. Compared with 39 normal eyes of age- and sex-matched controls, the prevalence of partial posterior vitreous detachment was significantly higher in toxoplasmosis (P less than .001). A higher prevalence of posterior vitreous detachment was found in eyes with the major chorioretinal lesion outside the temporal vascular arcade than in those with lesions inside the temporal vascular arcade (P less than .05). Our results indicated that various vitreous changes may cause posterior vitreous detachment and that location of the inflammatory focus may influence the vitreous condition.