Karen Cropsey, Psy.D., and Karen Gamble, Ph.D., professors in the Department of Psychiatry and Behavioral Neurobiology, have received a new grant totaling $4.4 million over a 4-year period to support their study “Medications for opioid use disorder differentially modulate intrinsically photosensitive retinal ganglion cell function, sleep, and circadian rhythms: implications for treatment.”