The Devastation of Darkness: Disability in Exodus 10:21-23, 27 And Intensification in the Plagues is an essay by Candida Moss and now available at Academia.edu here.
In this article, we will argue that, though lacking elaboration, the effects of the darkness wonder described in Exod 10:23a connote an imposition of blindness and lameness upon the Egyptians. These impairments, conventionally paired in biblical literature, are here put to narrative use with powerful effect. With such an understanding of the darkness episode, the intensi!cation pattern that others have suggested for the plagues is set on solid footing, both at the level of the Priestly source of which it is a part and in the compiled, canonical text.
Moss is the leading expert in the field of disability studies vis-a-vis the Bible. I commend her essay most heartily.
Zwinglius Redivivus 