Legge is the director of the Minnesota Laboratory for Low-Vision Research.
Legge did his postdoctoral training with Fergus Campbell at the Physiological Laboratory, Cambridge University.
Legge studies the roles of vision in reading, object recognition, and spatial navigation.
These have been summarized and reviewed in the book "Psychophysics of reading in normal and low vision", which also contains a CDROM with the original articles.
Together with J. Stephen Mansfield, Legge also developed the MNREAD test [1], which has become an internationally accepted standard test for measurement of reading acuity and reading speed in low vision clinics and clinical research.