dioptric
/daɪˈɒptrɪk/adjective
- of or relating to the refraction of light, especially in the organs of sight or in devices which aid or improve the vision屈光的, 折光的（尤指用于视力器官或装置以帮助或改善视力）。
词源
mid 17th cent.: from Greek dioptrikos, from dioptra, a kind of theodolite （see DIOPTRE）.