Macular Cystic Edema, is a common finding in many clinical inflammatory diseases. As far as I know, there is no special treatment for that condition and it ussualy gets better with the treatmen of the concommitant disease.
In a patient with Behcet disease the presence of resistant cystoid macular edema should be considered as a severe and vision-threatening complication. I would use infliximab even before classical immunosuppressant.
I sugest this reading: Levy-Clarke et al. Ophthalmology 2014;121:785.
retinal involvement should prompt treatment with a. cyclosporine- works quickly but relapses more, b. TNF alpha inhibitors- but costly and c. interferon alfa - quick action and longer remission. i have assumed that it is resistant to azathioprine which acts after almost 3 months.