Amblyopia, also referred to as âlazy eye,â is the most common cause of vision impairment in children. Amblyopia is the medical term used when the vision in one of the eyes is reduced because the eye and the brain are not working together properly.
U.S. National Library of Medicine(0.00 / 0 votes)Rate this definition: Environmental Exposure. The exposure to potentially harmful chemical, physical, or biological agents in the environment or to environmental factors that may include ionizing radiation, pathogenic organisms, or toxic chemicals.
By definition, exposure is a measure of the amount of ionizations produced in air by photon radiation. gray: Gray (Gy) is the unit in the International System of Units used to describe absorbed radiation dose. It describes a specific amount of energy absorbed in a medium (human tissue, for example). In the traditional units, the rad describes absorbed radiation dose. One gray is equal to 100 rad. observable health effect: An observable health effect is a change in physical health that can be detected medically.