Figure 1. Appearance of the prismatic sector fitted on the lens on the side of the loss (in this case right)

From

Light Sensitivity and Visual Field Extension in Hemianopes Wearing Halfmoon Prismatic Sectors

Carlo Aleci, Tiziana Usai, Marzia Paiola

American Journal of Medical and Biological Research. 2013, 1(3), 77-85 doi:10.12691/ajmbr-1-3-4