Multivariate analysis demonstrated that baseline predictors for sporadic vision loss included worse baseline VA ( OR 2.92 , 95 % confidence interval [ CI ] :1.65 -5.17 for 20/200 compared with 20/40 ) , scar ( OR 2.21 , 95 % CI :1.22 -4.01 ) , intraretinal foveal fluid on optical coherence tomography ( OR 1.80 , 95 % CI :1.11 -2.91 ) , and medical history of anxiety ( OR 1.90 , 95 % CI :1.12 -3.24 ) and syncope ( OR 2.75 , 95 % CI :1.45 -5.22 ) .