Shao, E. H., Gallagher, K. and Malik, N. (2012) “A 44-year-old woman with a 3-month history of bilateral, painless visual loss in the absence of other symptoms”, Digital Journal of Ophthalmology. Boston, Massachusetts, USA, 18(4), pp. 12–14. doi: 10.5693/djo.03.2012.12.001.