Create an elaborate light-proof set. Populate it with sighted people and get them to perform tasks in that darkness. Every now and then shoot with the flash, the light willgive them glimpses of what they are doing and allow them to organize but also capture each subjects relief for a brief glimpse of the sighted world.
A variation or an adjunct to tis concept is to set up portrait lighting on a given subject. Turn out all light and allow the subject and photographer to acclimatize to complete darkness and then shoot a photograph that focuses on their dilated pupils. In a way this would result in the temporarily blind taking a picture of a temporarily blind subject.
Film the whole thing as well and use the combination of both for the exhibition.