college of optometrists in vision development college of optometrists in vision development the college of optometrists in vision development (covd) consists of optometrists, vision therapists, and other vision specialists. "covd" redirects here. not to be confused with coronavirus disease 2019. optometry & vision development is an official covd peer reviewed publication. it is published four times a year and is an open access international journal that is available both online and in hard copy.