Okasha is recognised for her expertise in inscribed objects from the
early medieval period, with her research into
epigraphy spanning
archaeology,
history, and
literature, especially
Old English literature and language. on display at the British Museum. Her
Hand-List of Anglo-Saxon Non-Runic Inscriptions (1971) collated descriptions and transcriptions of 158 inscribed, or carved, objects from the early medieval England and Scotland, including jewellery, sculpture, and weapons, and notable objects including the
Ruthwell Cross,
Alfred Jewel, and
Frank's Casket. Eight of the inscriptions had never been published before, with a reviewer noting that the work could become a 'standard reference'. In 2009, she was part of the British Museum team to examine the
Staffordshire Hoard. She identified that there are 16 "accurate biblical quotations" within the Hoard's objects, with only two from the Old Testament. She is a co-author, with Ann Preston-Jones, of the 'Cornwall' volume of the
Corpus of Anglo-Saxon Stone Sculpture published in 2015
, part of a long running project to document all sculpture from early medieval England edited by Rosemary Cramp. In the volume, Okasha and Preston-Jones put Cornish sculpture into context with Welsh, Irish, and other Western British examples, as well as the potential Scandinavian design influence evidenced in material culture but not present in any recorded settlements. A version of the academic volume was also published as a mass market book, which was awarded the 2022 Holyer an Gof 2022 prize for leisure and lifestyle. Okasha taught at
University of Aberdeen,
University of East Anglia,
Assiut University, Egypt,
University of Dundee, and University College Cork. At Cork, she supported refugee and asylum-seeker students, enabling them to study English language. == Personal life ==