On each date , three infected mice and two age - matched uninfected control mice were sacrificed ; left eyeballs from infected mice were examined for larvae under a dissecting microscope while all right eyeballs were embedded in paraffin for histologic study 每次牺牲三只感染鼠与二只同龄未感染鼠，藉解剖显微镜检视左眼是否出现幼虫，右眼部分则加以包埋后进行组织病理学检测。
