PURPOSE: To evaluate the rapid effects of pulse corti, costeroid therapy on the serous retinal detachment found at the acute phase of Vogt-Koyanagi-Harada disease. DESIGN: Interventional case series. METHODS: Nine Japanese patients determined to be at the acute phase of Vogt-Koyanagi-Harada disease with serous retinal detachment were treated with pulse corticosteroid therapy. Optical coherence tomography was used to follow the resolution of the retinal detachment. RESULTS: Optical coherence tomography images showed a marked decrease in the retinal detachment immediately after the first intravenous injection of corticosteroid. and subsequent resolution. CONCLUSION: The rapid improvement of serous retinal detachment associated with Vogt-Koyanagi-Harada disease following pulse corticosteroid therapy supports an early therapeutic mechanism related to improved permeability of capillaries and permeability of the blood-retinal barrier rather than an anti-inflammatory or immunosuppressive action. (C) 2002 by Elsevier Science Inc. All rights reserved.