Abstract

Many factors have been associated with dyslexia, including visual anomalies (Evans and Drasdo, 1990) and subtle cortical pathology (Sherman et al., 1989). Recent research has suggested that up to 70% of reading disabled children may have a deficit of the transient visual system (Lovegrove et al., 1986). The transient/sustained distinction is likely to be an oversimplification (Kaplan et al., 1991); it has, however, withstood investigation reasonably well and its usefulness as an organising tool in dyslexia research seems to warrant further investigation at the present time.

© 1992 Optical Society of America