It is believed to be controlled by a genetic cluster, or large group of genes, and ranges in severity from mild impairment to total blindness. (mascaonline.com)
In addition, plaque - positive participants with mild impairment were more than twice as likely to be started on cognitive - enhancing medication than those without plaque. (sciencedaily.com)
This is a relatively mild impairment; participants did not report chest pain. (emoryhealthsciblog.com)