In patients with anterior uveitis, decrease in vision due to posterior segment involvement can occur because of -
Visual floaters
Inflammatory disc edema
Exudative retinal detachment
CME
Posterior involvement is changes in the vitreous and retina: Exudates and inflammatory cells may be seen in the anterior vitreous after an attack of acute iridocyclitis. Cystoid macular edema(CME) may occur, specially in the chronic iridocyclitis.
Uveal tract