. . . . "astigmatism"^^ . . "astigmatism"@en-us . "0"^^ . "0"^^ . . . . "(optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point"@en-us . . "110043771"@en-us . . . "113147953"@en-us . . . . "astigmia"@en-us . . . . "13938899-n"^^ . . . "113938899"^^ . . . . .